CN103111094A - Preparation and application of hexahistidine-tagged protein immunoaffinity purification and enrichment column - Google Patents
Preparation and application of hexahistidine-tagged protein immunoaffinity purification and enrichment column Download PDFInfo
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- CN103111094A CN103111094A CN201210481545XA CN201210481545A CN103111094A CN 103111094 A CN103111094 A CN 103111094A CN 201210481545X A CN201210481545X A CN 201210481545XA CN 201210481545 A CN201210481545 A CN 201210481545A CN 103111094 A CN103111094 A CN 103111094A
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Abstract
The invention provides an His-tagged recombinant protein immunoaffinity purification and enrichment column capable of efficiently and specifically enriching hexahistidine-tagged protein and a preparation method and application thereof. The provided immunoaffinity purification and enrichment column comprises an activated agarose filler coupled with an immunoaffinity-purified His-specific polyclonal antibody and a plastic column loaded with the immunoaffinity filler, wherein the His-specific polyclonal antibody coupled with the immunoaffinity filler is extracted by an immunoaffinity method. The immunoaffinity purification and enrichment column is prepared by loading the immunoaffinity filler into the special plastic column; and the immunoaffinity purification and enrichment column is high in efficiency and strong in specificity while enriching His-tagged recombinant protein, is mild in diluting conditions, can be repeatedly utilized and is an ideal material for separating, purifying and enriching the His-tagged recombinant protein.
Description
Technical field
The present invention relates to a kind of bio-separation, purification enrichment device, preparation method and the application thereof of the immunoaffinity purification enriching column of especially a kind of efficient separation and purification, enrichment hexahistine His label recombinant protein.
Background technology
Molecular biology and proteomics are the Hot subjects in life science field, and the use of recombinant protein is increasing in recent years greatly.For convenience of mark, tracking, evaluation and the purifying of gene recombinant protein, can artificially introduce a segment mark label polypeptide and form recombinant protein in target protein is expressed.The technology of therefore separation and purification, enrichment recombinant protein more and more shows its importance.Separation and purification from the expression system of complicated, enrichment target protein are an arduousness and heavy task, and affinity chromatography is the method for separation and purification the most widely at present, enrichment recombinant protein.
Owing at present mainly containing the affine post of metal-chelating for separating of the affinity column of purifying, enrichment His recombinant protein and utilizing the substrate, reactive fuel of enzyme to be the affinity column of aglucon, there are the remarkable shortcomings such as non-specific adsorption, elution requirement is violent, refining effect is not good in these affinity columns, and the affine post of metal-chelating also exists metal ion to be shed to defective in eluent, and these all will limit separating-purifying target protein out follow-up application, detection.His label polypeptide molecular weight is little, does not affect the function of target protein, and has the characteristics of easy separation and purifying, is the most widely used a kind of for the label recombinant protein of purifying at present.
Summary of the invention
The purpose of this invention is to provide immunoaffinity purification enriching column preparation method and the application thereof of a kind of efficient, specific isolation purifying, enrichment His label recombinant protein.
For reaching above-mentioned purpose, the present invention adopts specific reaction and the dissociable characteristic Ag+Ab (solid phase) of antigen-antibody for 2 times
Ag-Ab (solid phase) principle, specific as follows:
At first utilize this principle that His small peptide hapten conjugation is made His-Agarose affinity column on Agarose, be used for extracting the His specific polyclonal antibody.
Recycle this principle and will extract the anti-His specific antibody Anti-His of gained and be coupled to and make Anti-His-Agarose immune affinity column on Agarose, for separating of the His label recombinant protein in purifying, enrichment of cell lysate.
According to above-mentioned mechanism, the present invention adopts following technical scheme:
A kind of preparation method of hexahistine label protein immunoaffinity purification enriching column is characterized in that:
1) the chemical coupling reaction of the hexahistine His specific polyclonal antibody of immunoaffinity purification being adopted streaming cross post is coupled on the agarose Agarose of sodium periodate oxidation, use sodium borohydride reduction, clean unconjugated antibody with distilled water, clean filler with phosphate buffer PBS, 10 times of packing volumes/time, wash 4 times, add equal-volume glycerine after drip-dry PBS, mixing namely gets the affine filler of His label recombinant protein immunity;
2) the affine filler of His label recombinant protein immunity is packed in plastic column, volume dress post on demand namely gets described His label recombinant protein immunoaffinity purification enriching column.
Made His label recombinant protein immunoaffinity purification enriching column, comprise coupling have immunoaffinity purification the His specific polyclonal antibody the agarose filler and load the plastic column of the affine filler of this immunity.
The His specific polyclonal antibody of described immunoaffinity purification, to make the immunogen immune animal with the carrier protein that the coupling of His small peptide activates, obtain containing antibody serum, to contain on antibody serum to coupling the immune affinity chromatographic column of His small peptide will be arranged, clean unconjugated impurity, with His specific polyclonal antibody under the weak acid wash-out, desalination, freeze-drying are standby.
Described His small peptide, adopt 4 groups of amino acid residues in the His hexahistine, be divided into 2 groups and introduce in the opposite direction the His small peptide that cysteine sulfydryl SH group makes sulfhydrylation, its sequence is: 1) cysteinyl-histidyl--histidyl--histidyl--histidine is C-HHHH, 2) histidyl--histidyl--histidyl--histidyl--cysteine is HHHH-C.
The immunogene that the carrier protein of described His small peptide coupling activation makes; with common carrier albumen such as dodecyl sodium sulfate SDS sex change hemocyanin KLH or ovalbumin OVA, then with iodacetyl-hydroxysuccinimide eater be that the reaction of iodacetyl-NHS generates iodacetyl KLH or OVA.After removing excessive iodoacetic acid by sephadex G 25 Sephadex desalinations, sulfhydrylation His small peptide is mixed with KLH or the OVA of iodacetyl, transfer pH=8.5, shake reaction 60 minutes in room temperature, what obtain after G25 Sephadex desalination is immunogene.
Described coupling has the immune affinity chromatographic column of His small peptide; it is the Agarose reaction with His small peptide haptens and the iodacetyl of 2 kinds of opposite direction sulfhydrylations; form chemical covalent bond complex filler His-Agarose, His-Agarose is filled post namely get the immune affinity chromatographic column that coupling has the His small peptide.
A kind of application of hexahistine label protein immunoaffinity purification enriching column is with the His specific polyclonal antibody coupling of immunoaffinity purification enriching column with the immunoaffinity purification of using horseradish peroxidase-labeled HRP.
Advantage of the present invention:
The prepared immunoaffinity purification enriching column of the present invention has following significant advantage:
(1) 4 the amino acid whose His small peptides that only have that adopt as the His specific polyclonal antibody of aglucon are that the immunogene stimulating animal produces, and antibody is stronger to the His label protein recognition capability in expression system; And antibody adopts immune-affinity chromatography to purify, purification gained antibody specificity is high, make antibody and sepharose 4B coupling density large, the coupling rate is high, obviously improves with the His label recombinant protein efficient of the affine filler recognition expression of the prepared immunity of the antibody of this high specific system.
(2) adopt the Agarose of sodium periodate activation, make antibody and Agarose form stable chemical bond, the antibody that is coupled on filler is not easy to come off, and can more accurately separate, enrichment His label recombinant protein.
(3) horseradish peroxidase HRP on the His specific polyclonal antibody mark of the immunoaffinity purification of gained is obtained Anti-His HRP, directly to be used for detecting the concentration effect of immunoaffinity purification enriching column more accurate for the mark primary antibodie; This immunoaffinity purification enriching column elution requirement is gentle simultaneously, and the energy Reusability reduces costs.Present separating-purifying, the desirable material of enrichment His label recombinant protein.
Description of drawings
Fig. 1 detects His label recombinant protein immunoaffinity purification enriching column absorption target protein figure with immuno-precipitation.In figure: 1 is molecular weight marker;
25 times of dilutions of bacterial lysate stoste supernatant, the 10 μ L for restructuring His label protein;
The 3 filtrate 10 μ Ls of 5 times of dilutions of bacteria lysis stoste supernatant after the enrichment of His label recombinant protein immunoaffinity purification enriching column for restructuring His label protein;
The 4 eluent 5 μ Ls of 5 times of dilutions of bacteria lysis stoste supernatant after the enrichment of HIS label recombinant protein immunoaffinity purification enriching column for restructuring His label protein;
The 5 eluent 10 μ Ls of 5 times of dilutions of bacteria lysis stoste supernatant after the enrichment of HIS label recombinant protein immunoaffinity purification enriching column post for restructuring His label protein;
The 6 eluent 15 μ Ls of 5 times of dilutions of bacteria lysis stoste supernatant after the enrichment of HIS label recombinant protein immunoaffinity purification enriching column post for restructuring His label protein.
Accompanying drawing 1 illustrates His label recombinant protein immunoaffinity purification enriching column can identify His label protein in the bacterial lysate of restructuring His label protein, and can be with the absorption of His label protein, and the His label protein that is adsorbed on filler can be used the weak acid wash-out.
Accompanying drawing 2 is to detect His label recombinant protein immunoaffinity purification enriching column concentration effect figure with immuno-precipitation.
In figure:
1 is molecular weight marker;
2 50 times of dilutions of bacterial lysate stoste supernatant, the 10 μ L for restructuring His label protein;
The 3 filtrate 10 μ Ls of 50 times of dilutions of bacterial lysate stoste supernatant after His label recombinant protein immunoaffinity purification enriching column enrichment His for restructuring His label protein;
The 4 eluent 10 μ Ls of 50 times of dilutions of bacterial lysate stoste supernatant after the enrichment of His label recombinant protein immunoaffinity purification enriching column for restructuring His label protein.
Wherein 4 roads, the left side do not add the inhibition of His polypeptide, and 4 roads, the right add the His polypeptide to suppress.
Accompanying drawing 2 illustrate His label recombinant protein immunoaffinity purification enriching column can be from contain the very low bacterial lysate of restructuring His label protein enrichment His label protein.Can suppress fully with the His polypeptide, illustrate that the immune marking signal that obtains is the His specific signals.
Accompanying drawing 3 is with His label recombinant protein immunoaffinity purification enriching column and Anti-His-HRP coupling design sketch, in figure:
:
The NZHUS art.1 is molecular weight marker;
The 2 eluent 5 μ Ls of 10 times of dilutions of bacteria lysis stoste supernatant after the enrichment of His label recombinant protein immunoaffinity purification enriching column for restructuring His label protein
The 3 eluent 15 μ Ls of 10 times of dilutions of bacteria lysis stoste supernatant after the enrichment of His label recombinant protein immunoaffinity purification enriching column for restructuring His label protein.
Annotate: the bacterial lysate of accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 experiment restructuring used His label proteins is from same pipe, available from Wuhan Sanying Bio-Technology Co., Ltd..
The specific embodiment
It is in order further to understand better the present invention that following embodiment is provided, and never content of the present invention and protection domain is consisted of any restriction.
The preparation of the His specific polyclonal antibody of embodiment 1 immunoaffinity purification
1.1 His small peptide hapten design
Adopt 4 groups of amino acid residues in the His hexahistine, be divided into 2 groups and introduce in the opposite direction the His small peptide that cysteine sulfydryl SH group makes sulfhydrylation.
1.2 His small peptide immunogene preparation
Get 5 mg/mL KLH 10 mL, add the 100 saturated Na of μ L
2CO
3Boil sex change in 5 minutes after adding again the SDS mixing of 1 mL 10%; generate iodacetyl KLH with iodacetyl-NHS reaction again; after removing excessive iodoacetic acid by G25 Sephadex; the His small peptide haptens that adds 55 mg is transferred pH=8.5, and room temperature reaction is after 60 minutes; obtain His-KLH covalent bond complex, what obtain after G25 Sephadex desalination is immunizing antigen.Using ovalbumin OVA instead is that carrier protein prepares detection envelope antigen His-OVA. with same method
1.3 polyclonal antiserum preparation: be immune animal with new zealand white rabbit, vaccine concentration is 1mg/mL, first immunisation adds 1mL Freund's complete adjuvant mixing multi-point injection with the 0.5mL vaccine, the each every rabbit of booster immunization adds 0.75mLPBS with the 0.25mL vaccine and adds 1mL Freunds incomplete adjuvant mixing and divide 2 injections, after first immunisation, at interval of 2 all booster immunizations once, gathered serum detection titre in 35-40 days, serum titer carries out the preparation of productivity serum after reaching 1:6400.
1.4 His small peptide-Agarose affinity column preparation.
Be dissolved in 10 mL 0.1 mol/L Na 1.4.1 get 2 g lysines
2CO
3,Fully join 20 mL after dissolving with mixing in the Agarose of sodium periodate activation, 60 ℃ were reacted 5 minutes, and shook up and again react 10 minutes, turn 4 ℃ standing 20 minutes, then add sodium borohydride 100 mg mixings, shaken over night on the room temperature shaking table obtains amino-agarose 20 ml.
1.4.2 amino-agarose of 20 ml is transferred to void column of 50ml cleaning, cleans for 5 times with 500ml distillation moisture.Drain water standby.
1.4.3 clean amino-agarose with cold acetone, then clean with the 25ml acetone soln that contains the 0.5ml triethylamine, also surplus 1/3 during on the filler upper strata, repeatedly shake resuspended amino-agarose when solution.
1.4.4 with the iodoacetic acid of 1 ml dimethyl fumarate DMF dissolving 75 mg NHS activation, thoroughly after dissolving, 1000 rev/mins centrifugal 1 minute, get supernatant and dropwise add the resuspended good amino-agarose of 1.4.3 while vibrate, cover tightly, the room temperature lucifuge was reacted 60 minutes.
1.4.5 amino-agarose is filled post, and drip-dry washes excessive iodoacetic acid, moves to after drip-dry in the clean tube of 50 ml;
1.4.6 contain the 0.1 mol/L Na of 10 mmol/L disodium ethylene diamine tetraacetate EDTA with 1 ml
2CO
3Solution dissolving 10 mg His small peptides, on amino after joining 1.4.5 and cleaning-Agarose room temperature middling speed shaking table, reaction is 60 minutes, obtains His-Agarose, with this His-Agarose dress post, after fully cleaning with the phosphate buffer PBSt that contains 0.05% tween, then be neutralized to PH=7 with PBS.
1.5 the His specific polyclonal antibody is purified: the immune serum of 500 mL is flow through the made immune affinity chromatographic column of step 1.4.6.Clean unconjugated impurity, the His specific polyclonal antibody on post is with 1.6% acetic acid wash-out.The antibody of wash-out removes acetic acid with the bag filter dialysis, and freeze-drying is standby.
Detect through indirect ELISA, result shows that the His specific polyclonal antibody of the immunoaffinity purification that the present invention is made tires very highly, and specificity is very high.
Agarose 3 mL of sodium periodate activation change in pillar 2.1 learn from else's experience, and wash with 100 mL distillations, and drip-dry is after 0.1 mol/L Na of 2 times of volumes of Agarose
2CO
3, drip-dry is standby;
2.2 with 300 mg through the His of immunoaffinity purification specific polyclonal antibody with 0.1 mol/L Na
2CO
3Dissolving makes concentration reach 20 mg/mL, fully centrifuging and taking supernatant after the dissolving;
2.3 supernatant adds in the affinity column of step 2.1, collects efflux and again crosses post, 3-5 time repeatedly;
2.4 with 20 mL distilled water, unconjugated antibody is come out, is collected together;
2.5 be sodium borohydride solution 1.2 mL of 10 mg/mL with the distilled water compound concentration, add in pillar, the vibration mixing, 4 ℃ were reacted 30 minutes;
2.6 the PBS with 10 times of packing volumes washes filler, drip-dry PBS moves into filler in clean test tube, adds the glycerine that equates with packing volume, namely gets the affine filler of His label recombinant protein immunity.
2.7 filter membrane is loaded onto in the lower end in the tailormadepiston post, and the affine filler of His label recombinant protein immunity is measured in the post of packing on demand, the filler upper strata covers filter membrane, namely gets described His label recombinant protein immunoaffinity purification enriching column.
This immunoaffinity purification enrichment affinity column preservation condition is :-20 ℃.
Embodiment 3 His specific antibody mark horseradish peroxidases
3.1 claim the His specific polyclonal antibody of 5 mg immunoaffinity purifications, be dissolved in 100 μ L 0.1 mol/L Na
2CO
3, reacted 10 minutes, add the activated horseradish peroxidase of 5 mg, mixing by antibody amount: horseradish peroxidase=1:1;
3.2 add 1 mg sodium borohydride, the mixing final vacuum, move to after placing 1 minute in-20 ℃ 4 ℃ standing 2 hours;
3.3 through the desalination of G25 Sephadex desalting column;
3.4 adding BSA to make the BSA final concentration is 1mg/mL, then adds 50% glycerine, detects the use titre of institute's labelled antibody with the ELISA method.
4.1 get His label recombinant protein immunoaffinity purification enrichment filler 100 μ L dress posts, wash pillar with 500 μ L 0.05 mol/L HCl, PBS is washed till neutrality;
4.2 the bacterial lysate centrifuging and taking supernatant 2ml of restructuring His label protein dilutes the 5 times of rear His of mistake label recombinant protein immunoaffinity purification enriching columns with distilled water with supernatant;
4.3 wash pillar with 3 mL PBSt, then with 3 mL distillation washing pillars, with the PBSt eluant solution of 300 μ L 0.05 mol/L HCl, collect 300 μ L eluents, add 10 μ L saturated sodium carbonate neutralizations and make PH=7.
4.4 each 300 μ L of bacterial lysate stoste supernatant 5 times of dilutions, filtered solution and eluents that get restructuring His label protein equivalent respectively add the 5 sample-loading buffer 5*loading buffer that take advantage of, boiled 5 minutes, centrifugal, get supernatant point sample leakage of electricity swimming, do immunoblot experiment.Experimental result such as Fig. 1.
Embodiment 5 use immuno-precipitations detect the concentration effect of His label recombinant protein immunoaffinity purification enriching column
5.1 get His label recombinant protein immunoaffinity purification enrichment filler 100 μ L dress posts, wash pillar with 500 μ L 0.05 mol/L HCl, PBS is washed till neutrality;
5.2 the bacterial lysate stoste centrifuging and taking supernatant 0.2ml of restructuring His label protein dilutes the 50 times of rear HA of mistake label recombinant protein immunoaffinity purification enriching columns with distilled water with supernatant;
5.3 wash pillar with 3 mL PBSt, then with 3 mL distillation washing pillars, with the PBSt eluant solution of 300 μ L 0.05 mol/L HCl, collect 300 μ L eluents, add 10 μ L saturated sodium carbonate neutralizations and make PH=7.
5.4 each 300 μ L of bacterial lysate stoste supernatant 50 times of dilutions, filtered solution and eluents that get restructuring His label protein equivalent respectively add 5*loading buffer, boil 5 minutes, and are centrifugal, get supernatant point sample leakage of electricity swimming, do immunoblot experiment., do 2 repetitions, after doing the Western blotting transferring film, one is repeated not add the inhibition of HA polypeptide, and another repeats to add the inhibition of HA polypeptide, experimental result such as Fig. 2.
The HA specific polyclonal antibody coupling of the immunoaffinity purification of embodiment 6 His label recombinant protein immunoaffinity purification enriching columns and use horseradish peroxidase-labeled
6.1 get His label recombinant protein immunoaffinity purification enrichment filler 50 μ L dress posts, wash pillar with 250 μ L 0.05 mol/L HCl, PBS is washed till neutrality;
6.2 get the bacterial lysate stoste centrifuging and taking supernatant 1ml of restructuring His label protein, with distilled water, supernatant diluted the 10 times of rear His of mistake label recombinant protein immunoaffinity purification enriching columns;
6.3 wash pillar with 1.5 mL PBSt, then with 1.5 mL distillation washing pillars, with the PBSt eluant solution of 150 μ L 0.05 mol/L HCl, collect 150 μ L eluents, add 10 μ L saturated sodium carbonate neutralizations and make PH=7.
Add equivalent 5*loading buffer 6.4 get eluent 150 μ L, boil 5 minutes, centrifugal, get supernatant point sample leakage of electricity swimming, do immunoblot experiment.
6.5 when doing on Western blotting antibody, directly go up Anti-His-HRP, experimental result such as Fig. 3.Annotate: the bacterial lysate of embodiment 4, embodiment 5, embodiment 6 experiment restructuring used His label proteins is from same pipe, available from Wuhan Sanying Bio-Technology Co., Ltd..
Nanning City blue light Bioisystech Co., Ltd
＜120〉preparation of hexahistine label protein immunoaffinity purification enriching column and application thereof
<130> 2012
<140> 2012
<141> 2012-11-08
<160> 2
<170> PatentIn version 3.3
<210> 1
<211> 5
<212> PRT
＜213〉artificial sequence
<400> 1
Cys His His His His
1 5
<210> 2
<211> 5
<212> PRT
＜213〉artificial sequence
<400> 2
His His His His Cys
1 5
SEQUENCE LISTING
＜110〉Nanning City's blue light Bioisystech Co., Ltd
＜120〉preparation of hexahistine label protein immunoaffinity purification enriching column and application thereof
<130> 2012
<140> 2012
<141> 2012-11-08
<160> 2
<170> PatentIn version 3.3
<210> 1
<211> 5
<212> PRT
＜213〉artificial sequence
<400> 1
Cys His His His His
1 5
<210> 2
<211> 5
<212> PRT
＜213〉artificial sequence
<400> 2
His His His His Cys
1 5
Claims (8)
1. the preparation method of a hexahistine label protein immunoaffinity purification enriching column is characterized in that:
1) the chemical coupling reaction of the hexahistine His specific polyclonal antibody of immunoaffinity purification being adopted streaming cross post is coupled on the agarose Agarose of sodium periodate oxidation, use sodium borohydride reduction, clean unconjugated antibody with distilled water, clean filler with phosphate buffer PBS, 10 times of packing volumes/time, wash 4 times, add equal-volume glycerine after drip-dry PBS, mixing namely gets the affine filler of His label recombinant protein immunity;
2) the affine filler of His label recombinant protein immunity is packed in plastic column, volume dress post on demand namely gets described His label recombinant protein immunoaffinity purification enriching column.
2. the preparation method of hexahistine label protein immunoaffinity purification enriching column according to claim 1, it is characterized in that: made His label recombinant protein immunoaffinity purification enriching column, comprise coupling have immunoaffinity purification the His specific polyclonal antibody the agarose filler and load the plastic column of the affine filler of this immunity.
3. the preparation method of hexahistine label protein immunoaffinity purification enriching column according to claim 1, it is characterized in that: the His specific polyclonal antibody of described immunoaffinity purification, to make the immunogen immune animal with the carrier protein that the coupling of His small peptide activates, obtain containing antibody serum, to contain on antibody serum to coupling the immune affinity chromatographic column of His small peptide will be arranged, clean unconjugated impurity, with His specific polyclonal antibody under the weak acid wash-out, desalination, freeze-drying are standby.
4. the preparation method of hexahistine label protein immunoaffinity purification enriching column according to claim 3, it is characterized in that: described His small peptide, adopt 4 groups of amino acid residues in the His hexahistine, be divided into 2 groups and introduce in the opposite direction the His small peptide that cysteine sulfydryl SH group makes sulfhydrylation, its sequence is: 1) cysteinyl-histidyl--histidyl--histidyl--histidine is C-HHHH, 2) histidyl--histidyl--histidyl--histidyl--cysteine is HHHH-C.
5. the preparation method of hexahistine label protein immunoaffinity purification enriching column according to claim 3; it is characterized in that: the immunogene that the carrier protein of described His small peptide coupling activation makes; with common carrier albumen such as dodecyl sodium sulfate SDS sex change hemocyanin KLH or ovalbumin OVA, then with iodacetyl-hydroxysuccinimide eater be that the reaction of iodacetyl-NHS generates iodacetyl KLH or OVA.
6. after removing excessive iodoacetic acid by sephadex G 25 Sephadex desalinations, sulfhydrylation His small peptide is mixed with KLH or the OVA of iodacetyl, transfer pH=8.5, shake reaction 60 minutes in room temperature, what obtain after G25 Sephadex desalination is immunogene.
7. the preparation method of hexahistine label protein immunoaffinity purification enriching column according to claim 3; it is characterized in that: described coupling has the immune affinity chromatographic column of His small peptide; it is the Agarose reaction with His small peptide haptens and the iodacetyl of 2 kinds of opposite direction sulfhydrylations; form chemical covalent bond complex filler His-Agarose, His-Agarose is filled post namely get the immune affinity chromatographic column that coupling has the His small peptide.
8. the application of a hexahistine label protein immunoaffinity purification enriching column is with the His specific polyclonal antibody coupling of immunoaffinity purification enriching column with the immunoaffinity purification of using horseradish peroxidase-labeled HRP.
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| CN114950371A (en) * | 2021-12-16 | 2022-08-30 | 四川大学华西医院 | Nano antibody coupling filler and preparation method and application thereof |
| CN115282934A (en) * | 2022-08-02 | 2022-11-04 | 杭州博岳生物技术有限公司 | Nano antibody fluorescent affinity column and method for purifying HbeAg antigen by using same |
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