JP7462795B2 - トランスアミナーゼ突然変異体及びその使用 - Google Patents
トランスアミナーゼ突然変異体及びその使用 Download PDFInfo
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- 102000003929 Transaminases Human genes 0.000 title claims description 39
- 108090000340 Transaminases Proteins 0.000 title claims description 39
- -1 ketone compound Chemical class 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 20
- 210000004027 cell Anatomy 0.000 claims description 19
- 108020004414 DNA Proteins 0.000 claims description 18
- 125000003275 alpha amino acid group Chemical group 0.000 claims description 16
- 239000013612 plasmid Substances 0.000 claims description 15
- 150000001412 amines Chemical class 0.000 claims description 11
- 102000053602 DNA Human genes 0.000 claims description 9
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 9
- 238000005891 transamination reaction Methods 0.000 claims description 8
- 210000001236 prokaryotic cell Anatomy 0.000 claims description 7
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Natural products CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 6
- 241000588724 Escherichia coli Species 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 5
- 125000001153 fluoro group Chemical group F* 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- 210000003527 eukaryotic cell Anatomy 0.000 claims description 3
- 125000005843 halogen group Chemical group 0.000 claims description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 35
- 230000000694 effects Effects 0.000 description 27
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- 102000004190 Enzymes Human genes 0.000 description 15
- 108090000790 Enzymes Proteins 0.000 description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 238000003752 polymerase chain reaction Methods 0.000 description 15
- 108090000623 proteins and genes Proteins 0.000 description 14
- 239000000758 substrate Substances 0.000 description 11
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- ISYORFGKSZLPNW-UHFFFAOYSA-N propan-2-ylazanium;chloride Chemical compound [Cl-].CC(C)[NH3+] ISYORFGKSZLPNW-UHFFFAOYSA-N 0.000 description 7
- 102000004169 proteins and genes Human genes 0.000 description 7
- NGVDGCNFYWLIFO-UHFFFAOYSA-N pyridoxal 5'-phosphate Chemical compound CC1=NC=C(COP(O)(O)=O)C(C=O)=C1O NGVDGCNFYWLIFO-UHFFFAOYSA-N 0.000 description 7
- 238000006467 substitution reaction Methods 0.000 description 7
- 230000009466 transformation Effects 0.000 description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- 125000000217 alkyl group Chemical group 0.000 description 6
- 125000003710 aryl alkyl group Chemical group 0.000 description 6
- 125000003118 aryl group Chemical group 0.000 description 6
- 230000000977 initiatory effect Effects 0.000 description 6
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- 239000006228 supernatant Substances 0.000 description 6
- RWQNBRDOKXIBIV-UHFFFAOYSA-N thymine Chemical compound CC1=CNC(=O)NC1=O RWQNBRDOKXIBIV-UHFFFAOYSA-N 0.000 description 6
- 108010014303 DNA-directed DNA polymerase Proteins 0.000 description 5
- 102000016928 DNA-directed DNA polymerase Human genes 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 5
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- 241001156739 Actinobacteria <phylum> Species 0.000 description 4
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- UYTPUPDQBNUYGX-UHFFFAOYSA-N guanine Chemical compound O=C1NC(N)=NC2=C1N=CN2 UYTPUPDQBNUYGX-UHFFFAOYSA-N 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
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- 108091032973 (ribonucleotides)n+m Proteins 0.000 description 3
- QQZOPKMRPOGIEB-UHFFFAOYSA-N 2-Oxohexane Chemical compound CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 3
- 125000000539 amino acid group Chemical group 0.000 description 3
- 150000001413 amino acids Chemical class 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 150000002085 enols Chemical class 0.000 description 3
- 239000013613 expression plasmid Substances 0.000 description 3
- 238000000338 in vitro Methods 0.000 description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 description 3
- 238000002741 site-directed mutagenesis Methods 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 229940113082 thymine Drugs 0.000 description 3
- SUGXZLKUDLDTKX-UHFFFAOYSA-N 1-(2-nitrophenyl)ethanone Chemical compound CC(=O)C1=CC=CC=C1[N+]([O-])=O SUGXZLKUDLDTKX-UHFFFAOYSA-N 0.000 description 2
- HCEKGPAHZCYRBZ-UHFFFAOYSA-N 1-(3-fluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1 HCEKGPAHZCYRBZ-UHFFFAOYSA-N 0.000 description 2
- 229930024421 Adenine Natural products 0.000 description 2
- GFFGJBXGBJISGV-UHFFFAOYSA-N Adenine Chemical compound NC1=NC=NC2=C1N=CN2 GFFGJBXGBJISGV-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 102220591179 Receptor-type tyrosine-protein phosphatase kappa_H82S_mutation Human genes 0.000 description 2
- 150000008062 acetophenones Chemical class 0.000 description 2
- 229960000643 adenine Drugs 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- OPTASPLRGRRNAP-UHFFFAOYSA-N cytosine Chemical compound NC=1C=CNC(=O)N=1 OPTASPLRGRRNAP-UHFFFAOYSA-N 0.000 description 2
- 238000012217 deletion Methods 0.000 description 2
- 230000037430 deletion Effects 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000013604 expression vector Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 108091008146 restriction endonucleases Proteins 0.000 description 2
- 102220005402 rs33939421 Human genes 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 125000004434 sulfur atom Chemical group 0.000 description 2
- 241000589158 Agrobacterium Species 0.000 description 1
- 108020005544 Antisense RNA Proteins 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 108091026890 Coding region Proteins 0.000 description 1
- 108020004705 Codon Proteins 0.000 description 1
- 230000004543 DNA replication Effects 0.000 description 1
- 241000672609 Escherichia coli BL21 Species 0.000 description 1
- 241000620209 Escherichia coli DH5[alpha] Species 0.000 description 1
- 241000192125 Firmicutes Species 0.000 description 1
- 229910021380 Manganese Chloride Inorganic materials 0.000 description 1
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 108091081024 Start codon Proteins 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- AVKUERGKIZMTKX-NJBDSQKTSA-N ampicillin Chemical compound C1([C@@H](N)C(=O)N[C@H]2[C@H]3SC([C@@H](N3C2=O)C(O)=O)(C)C)=CC=CC=C1 AVKUERGKIZMTKX-NJBDSQKTSA-N 0.000 description 1
- 229960000723 ampicillin Drugs 0.000 description 1
- 230000003276 anti-hypertensive effect Effects 0.000 description 1
- 230000002924 anti-infective effect Effects 0.000 description 1
- 230000000692 anti-sense effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000003184 complementary RNA Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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- 229940104302 cytosine Drugs 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 238000013537 high throughput screening Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000000879 imine group Chemical group 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000006317 isomerization reaction Methods 0.000 description 1
- BPHPUYQFMNQIOC-NXRLNHOXSA-N isopropyl beta-D-thiogalactopyranoside Chemical compound CC(C)S[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O BPHPUYQFMNQIOC-NXRLNHOXSA-N 0.000 description 1
- 239000011565 manganese chloride Substances 0.000 description 1
- 235000002867 manganese chloride Nutrition 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003471 mutagenic agent Substances 0.000 description 1
- 231100000707 mutagenic chemical Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 230000000926 neurological effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009465 prokaryotic expression Effects 0.000 description 1
- 230000001915 proofreading effect Effects 0.000 description 1
- 238000002708 random mutagenesis Methods 0.000 description 1
- 238000003259 recombinant expression Methods 0.000 description 1
- 238000010188 recombinant method Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 230000000707 stereoselective effect Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000006276 transfer reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 241001515965 unidentified phage Species 0.000 description 1
- 210000005253 yeast cell Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
- C12N9/1096—Transferases (2.) transferring nitrogenous groups (2.6)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
- C12N15/52—Genes encoding for enzymes or proenzymes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/001—Amines; Imines
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/008—Preparation of nitrogen-containing organic compounds containing a N-O bond, e.g. nitro (-NO2), nitroso (-NO)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P17/00—Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms
- C12P17/10—Nitrogen as only ring hetero atom
- C12P17/12—Nitrogen as only ring hetero atom containing a six-membered hetero ring
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y206/00—Transferases transferring nitrogenous groups (2.6)
- C12Y206/01—Transaminases (2.6.1)
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/70—Vectors or expression systems specially adapted for E. coli
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
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- Genetics & Genomics (AREA)
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- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- Plant Pathology (AREA)
- Enzymes And Modification Thereof (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Description
(実施例1)
5mLの反応フラスコに、原料1、原料2、原料3及び原料4をそれぞれ30mg加え、pH8.5のTris-Cl(0.1M)、181μLのイソプロピルアミン塩酸塩(6M)、0.9mgのPLPを加え、トランスアミナーゼを300mg加え(具体的には表1を参照)、均一に混ぜ、総体積は1500μLであり、30℃、200rpmのシェーカーで16h反応させた。反応終了後、2倍量のメタノールを反応系に加え、均一に混ぜ、12000rpmで3min遠心分離して、上澄みを採取し、HPLCで検出し、波長は210nmである。一部の突然変異体の反応特性は以下のとおりである。
5mLの反応フラスコに、原料1、原料2、原料3及び原料4をそれぞれ30mg加え、pH8.5のTris-Cl(0.1M)、181μLのイソプロピルアミン塩酸塩(6M)、0.9mgのPLPを加え、トランスアミナーゼを210mg加え(具体的には、表2を参照)、均一に混ぜ、総体積は1500μLであり、30℃、200rpmのシェーカーで16h反応させた。反応終了後、2倍量のメタノールを反応系に加え、均一に混ぜ、12000rpmで3min遠心分離して、上澄みを採取し、HPLCで検出し、波長は210nmである。一部の突然変異体の反応特性は以下のとおりである。
5mLの反応フラスコに、原料1、原料2、原料3及び原料4をそれぞれ30mg加え、pH8.5のTris-Cl(0.1M)、181μLのイソプロピルアミン塩酸塩(6M)、0.9mgのPLPを加え、トランスアミナーゼを60mgを加え(具体的には、表3を参照)、均一に混ぜ、総体積は900μLであり、30℃、200rpmのシェーカーで16h反応させた。反応終了後、2倍量のメタノールを反応系に加え、均一に混ぜ、12000rpmで3min遠心分離して、上澄みを採取し、HPLCで検出し、波長は210nmである。一部の突然変異体の反応特性は以下のとおりである。
5mLの反応フラスコに、原料1、原料2、原料3及び原料4をそれぞれ30mg加え、pH8.5のTris-Cl(0.1M)、181μLのイソプロピルアミン塩酸塩(6M)、0.9mgのPLPを加え、トランスアミナーゼを60mg加え(具体的には表4を参照)、均一に混ぜ、総体積は900μLであり、30℃、200rpmのシェーカーで16h反応させた。反応終了後、2倍量のメタノールを反応系に加え、均一に混ぜ、12000rpmで3min遠心分離して、上澄みを採取し、HPLCで検出し、波長は210nmである。一部の突然変異体の反応特性は以下のとおりである。
5mLの反応フラスコに、原料1、原料2、原料3及び原料4をそれぞれ30mg加え、pH8.5のTris-Cl(0.1M)、181μLのイソプロピルアミン塩酸塩(6M)、0.9mgのPLPを加え、トランスアミナーゼを30mg加え(具体的には、表5を参照)、均一に混ぜ、総体積は900μLであり、30℃、200rpmのシェーカーで16h反応させた。反応終了後、2倍量のメタノールを反応系に加え、均一に混ぜ、12000rpmで3min遠心分離して、上澄みを採取し、HPLCで検出し、波長は210nmである。一部の突然変異体の反応特性は以下のとおりである。
5mLの反応フラスコに、原料1、原料2、原料3及び原料4をそれぞれ30mg加え、pH8.5のTris-Cl(0.1M)、181μLのイソプロピルアミン塩酸塩(6M)、0.9mgのPLPを加え、トランスアミナーゼを30mg加え(具体的には、表6を参照)、均一に混ぜ、総体積は900μLであり、30℃、200rpmのシェーカーで16h反応させた。反応終了後、2mLの酢酸エチルを反応系に加え、12000rpmで3min遠心分離して抽出し、上澄みを採取し、HPLCでee値を検出した。突然変異体の反応特性は次のとおりである。
2Lの反応フラスコに、原料1及び原料2をそれぞれ20g加え、pH8.5のTris-Cl(0.1M)、120mLのイソプロピルアミン塩酸塩(6M)、0.6gのPLPを加え、トランスアミナーゼを20g加え(具体的には、表6を参照)、均一に混ぜ、総体積は600mLであり、30℃、200rpmのシェーカーで16h反応させた。反応終了後、反応系に600mLの酢酸エチルを加え、12000rpmで3min遠心分離して抽出した。サンプルを後処理し、HPLCで検出して、収率、純度及びee値を測定した。
Claims (8)
- 請求項1に記載のトランスアミナーゼ突然変異体をコーディングする、
DNA分子。 - 請求項2に記載のDNA分子が連結されている、
組換えプラスミド。 - 請求項3に記載の組換えプラスミドを含有する、
宿主細胞。 - 前記宿主細胞は原核細胞又は真核細胞を含み、前記原核細胞は大腸菌である、
請求項4に記載の宿主細胞。 - 前記ハロゲンがフッ素原子である、
請求項6に記載の方法。
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