WO2004011490A1 - A immounlogical epitope of the hiv strain type o and the uses thereof - Google Patents

A immounlogical epitope of the hiv strain type o and the uses thereof Download PDF

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WO2004011490A1
WO2004011490A1 PCT/CN2002/000552 CN0200552W WO2004011490A1 WO 2004011490 A1 WO2004011490 A1 WO 2004011490A1 CN 0200552 W CN0200552 W CN 0200552W WO 2004011490 A1 WO2004011490 A1 WO 2004011490A1
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epitope
hiv
strain
amino acid
immunological epitope
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Yinghua Chen
Xiaonan Dong
Yi Xiao
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Tsinghua University
Beijing Qingda Yinghua Bio-Tech Co., Ltd.
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    • C07K16/1045Lentiviridae, e.g. HIV, FIV, SIV
    • C07K16/1063Lentiviridae, e.g. HIV, FIV, SIV env, e.g. gp41, gp110/120, gp160, V3, PND, CD4 binding site
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    • C12N2740/16134Use of virus or viral component as vaccine, e.g. live-attenuated or inactivated virus, VLP, viral protein

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  • the invention relates to an immunological epitope of HIV type 0 strain and its application.
  • HIV-1 caused by an immune disease, there is no effective cure for complete cure, and no vaccine can prevent it.
  • the high variability of immunodeficiency viruses has been a challenge in the design of HIV vaccines and drugs.
  • HIV-1 membrane protein gpl60 precursor protein of membrane protein gpl20 and transmembrane protein gp41
  • antibodies can inhibit mucosal transmission of HIV-1 virus and mother-to-child transmission, and can clear HIV-1 virus in the blood (Nature Medicine 1999, 5: 204; Nature Medicine 2000, 6: 200; Nature Medicine 1999, 5: 211);
  • the epitope-specific monoclonal antibody to the primary neutralizing epitope ELDKWA on the transmembrane protein g p41 of human immunodeficiency virus (HIV-1) can inhibit in vitro Multiple HIV-1 strains infect target cells (J. Virology 1993, 67: 6642; AIDS Res. Human Retroviruses 1994, 10: 1651; AIDS 1996, 10: 587).
  • HIV-1 can escape the neutralization of neutralizing antibodies by restricting mutations in neutralizing epitopes (Immunity 10, 431-438, 1999).
  • ELDKWA is recognized as an important HIV-1 neutralizing epitope. This epitope is highly conserved, but certain restrictive mutations at the D or K site can make the virus escape the neutralizing effect of monoclonal antibodies.
  • the object of the present invention is to provide a new immunological epitope of HIV type 0 strain.
  • An immunological epitope of HIV type 0 strain includes two adjacent amino acid residues whose nitrogen terminus is aspartic acid and whose carbon terminus is glutamic acid.
  • the amino acid residue usually connected at the nitrogen end of the immunological epitope is leucine; the amino acid residue usually connected at the carbon end is tryptophan, and the amino acid residue sequence of the immunological epitope is LDEW.
  • the amino acid residue linked to the nitrogen terminal is usually glutamic acid, and the amino acid residue linked to the carbon terminal is alanine.
  • the amino acid residue sequence of the immunological epitope is ELDEWA.
  • the inventor's search of the HIV database found that the transmembrane protein gp41 of all HIV-1 virus type 0 strains carries the ELDEWA epitope (as shown in Table '1), However, other HIV-1 virus subtypes do not carry this epitope, further confirming that ELDEWA is a unique epitope of HIV-1 virus type 0 strain, which can be used as a target site for the identification and diagnosis of HIV-1 virus type 0 strain. As a target site for therapeutic drugs.
  • Table 1 Characteristic ELDEWA epitopes of HIV-1 virus type 0 strain
  • a second object of the present invention is to provide a monoclonal antibody capable of specifically binding to an immunological epitope of the HIV type 0 strain of the present invention.
  • Monoclonal mouse hybridoma cell line 14D9 murine monoclonal antibody 14D9 subtype: IgG1).
  • the mouse hybridoma cell line 14D9 was deposited on June 27, 2002 at the General Microbial Center of the China Microbial Species Collection Management Committee (CGMCC for short), and the accession number is CGMCC Na 0753. ⁇
  • the monoclonal antibody 14D9 produced by the mouse hybridoma cell line 14D9 can specifically recognize the ELDEWA-epitope specific to the transmembrane protein gp41 of HIV-1 virus type 0 strain, and does not recognize the ELDKWA carried by other HIV-1 virus subtypes. ELNKWA- and ELEKWA- epitopes.
  • Figure 1 is an electrophoresis image of a monoclonal antibody of the present invention after reaction with a recombinant, soluble gp41 fusion protein with different epitopes.
  • An epitope polypeptide containing an ELDEWA-epitope specific to the transmembrane protein gp41 of HIV-1 0 strain was artificially synthesized.
  • the epitope polypeptide contains 4 repeated ELDEWA-immunological epitopes, and the amino acid residue sequence is: CELDEWAGELDEWAGELDEWAGELDEWA;
  • He'J used MBS (nrmaleimidobenzoyHHiydroxy succinimide ester) to couple the epitope polypeptide with the carrier protein BSA;
  • Example 2 Specific identification of the ELDEWA-epitope of HIV-1 virus type 0 strain by the antibody of the present invention
  • the monoclonal antibody secreted by the hybridoma cell line 14D9 was subjected to an incubation reaction with recombinant, soluble gp41 fusion proteins with different epitopes.
  • the results are shown in Figure 1. From the results in the figure, it can be seen that the hybridoma cell line 14D9 secreted
  • the monoclonal antibody specifically recognizes the ELDEWA-epitope of HIV-1 virus type 0 strain.
  • A molecular weight protein
  • B the monoclonal antibody of the present invention recognizes rsgp41 (GST-rsgp41) with the ELDEWA epitope.
  • ELDE wA 42KD]
  • C The monoclonal antibody of the present invention does not recognize rsgp41 (GST—rsgp41 EL
  • D The monoclonal antibody of the present invention does not recognize GST
  • E The monoclonal antibody of the present invention recognizes an ELDEWA epitope GST- ELDEWA (26KD) '.
  • ELDEWA is a unique epitope of HIV-1 virus type 0 strain. It can be used as a target site for the identification and diagnosis of HIV-1 virus type 0 strain, and can also be used as a target site for therapeutic drugs.
  • the monoclonal antibody of the present invention will be widely used in identifying and diagnosing HIV-1 virus type 0 strain and preparing passive immune drugs for infection of HIV-1 type 0 strain. Drugs using the monoclonal antibody of the present invention as an active ingredient can be widely used. Hope to be applied in the treatment of AIDS.

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Abstract

The present invention relates to a new immounlogical epitope of the HIV strain Type O and the uses thereof. The present invention provides a new immounlogical epitope of the HIV strain Type O. The N-end of the epitope is asparagine, its C-end is two adjacent residues of glutamic acid. The N-end of the epitope being consist of two amino acid residues usually links with the leucine residue. The C-end of the epitope usually ligates to the tryptophan residue. The amino acid sequence of the immounlogical epitope is LDEW. Based on the sequence, the N-end of it usually ligates to the glutamic acid residue. The C-end of it usually links with the alanine residue, So the amino acid sequence of the immounlogical epitope is ELDEWA. The epitope can be used as target for the identification and diagnosis of the HIV-1 Type O, also as target for drugs.

Description

艾滋病病毒 0型株的一个免疫学表位及其应用 技术领域  An immunological epitope of HIV type 0 strain and its application
本发明涉及艾滋病病毒 0型株的一个免疫学表位及其应用。  The invention relates to an immunological epitope of HIV type 0 strain and its application.
背景技术 Background technique
获得性免疫缺陷综合症, 又称艾滋病, 是由人类免疫缺陷病毒 I型 Acquired Immunodeficiency Syndrome, also known as AIDS, is caused by human immunodeficiency virus type I
( HIV-1 ) 引起的一种免疫性疾病, 目前尚无彻底治愈的有效药物, 也没有 疫苗可以预防。 免疫缺陷病毒的高变异性一直是 HIV疫苗和药物设计中的 难题。 (HIV-1) caused by an immune disease, there is no effective cure for complete cure, and no vaccine can prevent it. The high variability of immunodeficiency viruses has been a challenge in the design of HIV vaccines and drugs.
最近国外抗艾滋病药物临床研究结果证明, 在被动免疫治疗中, 组合 使用针对 HIV- 1 膜蛋白 gpl60 (膜蛋白 gpl20及跨膜蛋白 gp41的前体蛋白) 上 的几个特定中和表位的中和抗体 (其中包括 ELDKWA表位特异性的单克隆抗体 2F5) ,能抑制 HIV— 1病毒的粘膜传染以及母婴传播,并能清除血液中的 HIV— 1 病毒(Nature Medicine 1999, 5 : 204 ; Nature Medicine 2000, 6 : 200 ; Nature Medicine 1999, 5 : 211); 人免疫缺陷病毒(HIV- 1)跨膜蛋白 gp41 上的主要中和表位 ELDKWA的表位特异性单克隆抗体能够体外抑制多种 HIV— 1 病毒株感染靶细胞 (J. Virology 1993, 67 : 6642 ; AIDS Res. Human Retroviruses 1994, 10 : 1651 ; AIDS 1996, 10 : 587 ) 。 研究证明, HIV-1 能够通过中和表位的限制性变异逃脱中和抗体的中和作用 (Immunity 10, 431-438, 1999 ) 。 ELDKWA是公认的重要的 HIV- 1中和表位, 该表位的保守 性很强, 但在 D或 K位点的某些限制性变异, 能够使病毒逃脱单抗的中和作 用。 Recent clinical studies of anti-AIDS drugs abroad have proved that in passive immunotherapy, a combination of several specific neutralizing epitopes on HIV-1 membrane protein gpl60 (precursor protein of membrane protein gpl20 and transmembrane protein gp41) is used in combination. And antibodies (including the monoclonal antibody 2F5 specific to the ELDKWA epitope), can inhibit mucosal transmission of HIV-1 virus and mother-to-child transmission, and can clear HIV-1 virus in the blood (Nature Medicine 1999, 5: 204; Nature Medicine 2000, 6: 200; Nature Medicine 1999, 5: 211); The epitope-specific monoclonal antibody to the primary neutralizing epitope ELDKWA on the transmembrane protein g p41 of human immunodeficiency virus (HIV-1) can inhibit in vitro Multiple HIV-1 strains infect target cells (J. Virology 1993, 67: 6642; AIDS Res. Human Retroviruses 1994, 10: 1651; AIDS 1996, 10: 587). Studies have shown that HIV-1 can escape the neutralization of neutralizing antibodies by restricting mutations in neutralizing epitopes (Immunity 10, 431-438, 1999). ELDKWA is recognized as an important HIV-1 neutralizing epitope. This epitope is highly conserved, but certain restrictive mutations at the D or K site can make the virus escape the neutralizing effect of monoclonal antibodies.
发明公开 Invention Disclosure
本发明的目的是提供艾滋病病毒 0型株的一个新的免疫学表位。  The object of the present invention is to provide a new immunological epitope of HIV type 0 strain.
艾滋病病毒 0型株的一个免疫学表位, 包括氮末端为天门冬氨酸, 碳末 端为谷氨酸的两个相邻氨基酸残基。  An immunological epitope of HIV type 0 strain includes two adjacent amino acid residues whose nitrogen terminus is aspartic acid and whose carbon terminus is glutamic acid.
所述免疫学表位的氮端通常连接的氨基酸残基为亮氨酸; 碳端通常连接 的氨基酸残基为色氨酸, 这时该免疫学表位的氨基酸残基序列为 LDEW。 在 该序列的基础上, 通常氮端连接的氨基酸残基为谷氨酸, 碳端连接的氨基酸 残基为丙氨酸, 这时该免疫学表位的氨基酸残基序列为 ELDEWA。 The amino acid residue usually connected at the nitrogen end of the immunological epitope is leucine; the amino acid residue usually connected at the carbon end is tryptophan, and the amino acid residue sequence of the immunological epitope is LDEW. In Based on this sequence, the amino acid residue linked to the nitrogen terminal is usually glutamic acid, and the amino acid residue linked to the carbon terminal is alanine. At this time, the amino acid residue sequence of the immunological epitope is ELDEWA.
发明人通过对 HIV数据库 (http:〃 hiv-web. lanl. gov)的检索发现, 所 有 HIV- 1 病毒 0 型株的跨膜蛋白 gp41 均带有 ELDEWA表位 (如表 ' 1 所 示) , 而其它 HIV-1病毒亚型不带有此表位, 进一步证实 ELDEWA是 HIV - 1 病毒 0型株的特有表位, 可用于 HIV- 1病毒 0型株鉴别和诊断的靶位点, 也 可以作为治疗药物的靶位点。  The inventor's search of the HIV database (http: 〃 hiv-web. Lanl. Gov) found that the transmembrane protein gp41 of all HIV-1 virus type 0 strains carries the ELDEWA epitope (as shown in Table '1), However, other HIV-1 virus subtypes do not carry this epitope, further confirming that ELDEWA is a unique epitope of HIV-1 virus type 0 strain, which can be used as a target site for the identification and diagnosis of HIV-1 virus type 0 strain. As a target site for therapeutic drugs.
表 1: HIV-1 病毒 0型株带有特征性的 ELDEWA表位  Table 1: Characteristic ELDEWA epitopes of HIV-1 virus type 0 strain
Figure imgf000004_0001
本发明的第二个目的是提供能够与本发明艾滋病病毒 0型株的免疫学表 位专一结合的单克隆抗体。 单克隆抗体的小鼠杂交瘤细胞系 14D9 (鼠单克隆抗体 14D9 亚型: IgGl ) 。
Figure imgf000004_0001
A second object of the present invention is to provide a monoclonal antibody capable of specifically binding to an immunological epitope of the HIV type 0 strain of the present invention. Monoclonal mouse hybridoma cell line 14D9 (murine monoclonal antibody 14D9 subtype: IgG1).
小鼠杂交瘤细胞系 14D9 已于 2002年 06月 27 日保藏于中国微生物菌 种保藏管理委员会普通微生物中心 (简称 CGMCC ) , 保藏号为 CGMCC Na 0753 ο  The mouse hybridoma cell line 14D9 was deposited on June 27, 2002 at the General Microbial Center of the China Microbial Species Collection Management Committee (CGMCC for short), and the accession number is CGMCC Na 0753. ο
小鼠杂交瘤细胞系 14D9产生的单克隆抗体 14D9能够特异性识别 HIV - 1 病毒 0型株跨膜蛋白 gp41特有的 ELDEWA-表位, 而不识别其它 HIV- 1病毒 亚型所携带 ELDKWA -、 ELNKWA- 和 ELEKWA-表位。  The monoclonal antibody 14D9 produced by the mouse hybridoma cell line 14D9 can specifically recognize the ELDEWA-epitope specific to the transmembrane protein gp41 of HIV-1 virus type 0 strain, and does not recognize the ELDKWA carried by other HIV-1 virus subtypes. ELNKWA- and ELEKWA- epitopes.
下面结合具体实施例对本发明做进一步说明。  The present invention is further described below with reference to specific embodiments.
附图说明 BRIEF DESCRIPTION OF THE DRAWINGS
图 1为本发明单克隆抗体与带有不同表位的重组、 可溶性 gp41融合蛋白 反应后的电泳图。  Figure 1 is an electrophoresis image of a monoclonal antibody of the present invention after reaction with a recombinant, soluble gp41 fusion protein with different epitopes.
实施发明的最佳方式 The best way to implement the invention
实施例 1、 鼠类来源的杂交瘤细胞系 14D9的制备过程:  Example 1. Preparation process of murine-derived hybridoma cell line 14D9:
1、 人工合成一条含有 HIV- 1 0型株跨膜蛋白 gp41特有的 ELDEWA-表位的 表位多肽, 该表位多肽含有 4次重复的 ELDEWA-免疫学表位, 其氨基酸残基序 列为: CELDEWAGELDEWAGELDEWAGELDEWA;  1. An epitope polypeptide containing an ELDEWA-epitope specific to the transmembrane protein gp41 of HIV-1 0 strain was artificially synthesized. The epitope polypeptide contains 4 repeated ELDEWA-immunological epitopes, and the amino acid residue sequence is: CELDEWAGELDEWAGELDEWAGELDEWA;
2、 禾 'J用 MBS (nrmaleimidobenzoyHHiydroxy succinimide ester)将上述表位 多肽与载体蛋白 BSA耦联;  2. He'J used MBS (nrmaleimidobenzoyHHiydroxy succinimide ester) to couple the epitope polypeptide with the carrier protein BSA;
3、 将上述耦联物与福氏佐剂混合 (两种物质的重量比为, 耦联物: 福 氏佐剂 = 1 : 1 ) 免疫 Balb/c小鼠, 每两周免疫一次。 首次使用完全福氏佐 剂, 以后使用不完全福氏佐剂。 每次免疫抗原剂量为: 含 10微克表位多肽的 耦联物 /次 /只, 共免疫 3次;  3. Mix the above conjugate with Freund's adjuvant (the weight ratio of the two substances is: conjugate: Freund's adjuvant = 1: 1). Immunize Balb / c mice every two weeks. Full Freund's adjuvant was used for the first time and incomplete Freund's adjuvant was used afterwards. The dose of each immunized antigen is: conjugates containing 10 micrograms of epitope polypeptide / times / only, a total of 3 immunizations;
4、 将免疫后的小鼠脾细胞与小鼠骨髓瘤细胞采用常规细胞融合技术融 合, 并制备杂交瘤, 从杂交瘤细胞中筛选出能分泌 ELDEWA-表位特异性单克 隆抗体的杂交瘤;  4. Fusion the mouse spleen cells and mouse myeloma cells with conventional cell fusion technology, and prepare hybridomas, and select hybridomas that can secrete ELDEWA-epitope-specific monoclonal antibodies from the hybridoma cells;
5、 克隆杂交瘤, 获得能分泌 ELDEWA-表位特异性单克隆抗体的克隆杂交 瘤细胞系 14D9。 5. Cloning hybridomas to obtain clones capable of secreting ELDEWA-epitope-specific monoclonal antibodies Tumor cell line 14D9.
实施例 2、 本发明抗体对 HIV- 1病毒 0型株 ELDEWA-表位的特异性识 别  Example 2. Specific identification of the ELDEWA-epitope of HIV-1 virus type 0 strain by the antibody of the present invention
将杂交瘤细胞系 14D9分泌的单克隆抗体与带有不同表位的重组、 可溶性 gp41 融合蛋白进行温浴反应, 结果如图 1所示, 从图中的结果可以看出, 杂交瘤 细胞系 14D9分泌的单克隆抗体对 HIV-1病毒 0型株 ELDEWA-表位具有特异性识 另 lj, 图中, A: 分子量蛋白; B: 本发明单克隆抗体识别带有 ELDEWA表位的 rsgp41 (GST - rsgp41ELDEwA) 42KD〕 C : 本发明单克隆抗体不识别带有 ELDKWA表位的 rsgp41 (GST— rsgp41EL D : 本发明单克隆抗体不识别 GST; E: 本发明单克隆抗体识别含有 ELDEWA表位的 GST- ELDEWA (26KD) '。 工业应用 The monoclonal antibody secreted by the hybridoma cell line 14D9 was subjected to an incubation reaction with recombinant, soluble gp41 fusion proteins with different epitopes. The results are shown in Figure 1. From the results in the figure, it can be seen that the hybridoma cell line 14D9 secreted The monoclonal antibody specifically recognizes the ELDEWA-epitope of HIV-1 virus type 0 strain. In the figure, A: molecular weight protein; B: the monoclonal antibody of the present invention recognizes rsgp41 (GST-rsgp41) with the ELDEWA epitope. ELDE wA) 42KD] C: The monoclonal antibody of the present invention does not recognize rsgp41 (GST—rsgp41 EL D: The monoclonal antibody of the present invention does not recognize GST; E: The monoclonal antibody of the present invention recognizes an ELDEWA epitope GST- ELDEWA (26KD) '. Industrial applications
ELDEWA是 HIV- 1病毒 0型株的特有表位, 可用于 HIV- 1病毒 0型株鉴 别和诊断的靶位点, 也可以作为治疗药物的靶位点。 本发明的单克隆抗体在 鉴别、 诊断 HIV- 1病毒 0型株、 制备用于 HIV- 1 0型毒株感染被动免疫药物 中将得到广泛应用, 以本发明单克隆抗体为活性成份的药物可望在治疗艾滋 病中得到应用。 ELDEWA is a unique epitope of HIV-1 virus type 0 strain. It can be used as a target site for the identification and diagnosis of HIV-1 virus type 0 strain, and can also be used as a target site for therapeutic drugs. The monoclonal antibody of the present invention will be widely used in identifying and diagnosing HIV-1 virus type 0 strain and preparing passive immune drugs for infection of HIV-1 type 0 strain. Drugs using the monoclonal antibody of the present invention as an active ingredient can be widely used. Hope to be applied in the treatment of AIDS.
关于微生物保藏的说明 Notes on microbial deposits
(细则 13之二) (Rule 13bis)
Figure imgf000007_0001
Figure imgf000007_0001
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PCT/R0134表 (1992年 7月) Form PCT / R0134 (July 1992)

Claims

权利要求书 Claim
1、 艾滋病病毒 0型株的一个免疫学表位,包括氮末端为天门冬氨酸, 碳末端为谷氨酸的两个相邻氨基酸残基。 1. An immunological epitope of HIV type 0 strain, which includes two adjacent amino acid residues whose nitrogen end is aspartic acid and whose carbon end is glutamic acid.
2、 根据权利要求 1所述的艾滋病病毒 0型株的一个免疫学表位, 其特 征在于: 所述免疫学表位的氨基酸残基序列为 LDEW。  2. An immunological epitope of the HIV type 0 strain according to claim 1, characterized in that the amino acid residue sequence of the immunological epitope is LDEW.
3、 根据权利要求 2所述的艾滋病病毒 0型株的一个免疫学表位, 其特 征在于: 所述免疫学表位的氨基酸残基序列为 ELDEWA。  3. An immunological epitope of the HIV type 0 strain according to claim 2, characterized in that the amino acid residue sequence of the immunological epitope is ELDEWA.
4、 与权利要求 1一 3中任意一项所述艾滋病病毒 0型株的免疫学表位专 一结合的单克隆抗体。  4. A monoclonal antibody that specifically binds to an immunological epitope of an HIV type 0 strain according to any one of claims 1 to 3.
5、 由保藏号为 CGMCC ΝΩ0753的杂交瘤细胞系 14D9产生的与艾滋病病 毒 0型株抗原专一结合的单克隆抗体。  5. Monoclonal antibody specifically produced by the hybridoma cell line 14D9 deposited under the accession number CGMCC No. 0753, which specifically binds to the HIV type 0 strain antigen.
6、 鼠类来源的杂交瘤细胞系 14D9, CGMCC Na0753。  6. Murine-derived hybridoma cell line 14D9, CGMCC Na0753.
7、 权利要求 1一 3中任意一项所述的免疫学表位在鉴别、 诊断 HIV- 1病 毒 0型株中的应用。  7. The use of the immunological epitope according to any one of claims 1 to 3 in identifying and diagnosing HIV-1 virus type 0 strain.
8、 权利要求 1一 3中任意一项所述的免疫学表位作为治疗药物靶位点的 应用。  8. Use of the immunological epitope according to any one of claims 1 to 3 as a target site for a therapeutic drug.
5 5
PCT/CN2002/000552 2002-07-29 2002-08-09 A immounlogical epitope of the hiv strain type o and the uses thereof WO2004011490A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013909A1 (en) * 1990-03-15 1991-09-19 Proteus Molecular Design Limited Synthetic polypeptides
EP0492560A2 (en) * 1990-12-26 1992-07-01 Joseph P. Cotropia Human monoclonal antibodies directed against the transmembrane glycoprotein (gp41) of HIV-1, and related peptides
WO1994029339A1 (en) * 1993-06-09 1994-12-22 Connaught Laboratories Limited Tandem synthetic hiv-1 peptides

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013909A1 (en) * 1990-03-15 1991-09-19 Proteus Molecular Design Limited Synthetic polypeptides
EP0492560A2 (en) * 1990-12-26 1992-07-01 Joseph P. Cotropia Human monoclonal antibodies directed against the transmembrane glycoprotein (gp41) of HIV-1, and related peptides
WO1994029339A1 (en) * 1993-06-09 1994-12-22 Connaught Laboratories Limited Tandem synthetic hiv-1 peptides

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