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crystal structure of the cluster II Fab 1281 in complex with HIV-1 gp41 ectodomain External Resource: Annotation Chains Family Name Domain Identifier Architecture Possible Homology Homology Topology Family Provenance Source (Version) C [auth H] tRNA_int_endo e3p30H1 A: alpha arrays X: Immunoglobulin-like beta-sandwich H: Immunoglobulin-related T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like F: tRNA_int_endo ECOD (v295.2) B [auth L] tRNA_int_endo e3p30L1 A: alpha arrays X: Immunoglobulin-like beta-sandwich H: Immunoglobulin-related T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like F: tRNA_int_endo ECOD (v295.2) A DEAD e3p30A1 A: alpha arrays X: TIM beta/alpha-barrel H: TIM barrels T: TIM barrels F: DEAD ECOD (v295.2)
Chain Protein Name Description Organism Name Gene Allele Name(s) Domain Name(s) Receptor Type Receptor Description Provenance Source C [auth H] Fab 1281 VH-CH1 Homo sapiens (human) IGHV1-69*01, IGHV1-69*06, IGHV1-69*10, IGHV1-69*12, IGHV1-69*13, IGHV1-69*14, IGHV1-69D*01, IGHJ5*02, IGHG1*01, IGHG1*02, IGHG1*04 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_LAMBDA IMGT (202638-0) B [auth L] Fab 1281 L-LAMBDA Homo sapiens (human) IGLV1-47*01, IGLV1-47*02, IGLJ2*01, IGLJ3*01, IGLC2*01, IGLC2*02, IGLC3*04 V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA IG FAB-GAMMA-1_LAMBDA IMGT (202638-0)
Chain Chain Class Chain Subclass Chain Type Antigen Name(s) Provenance Source C [auth H] Heavy Chain IGHV1 - hiv-1 gp41 SAbDab (2026-10-02) B [auth L] Light Chain IGLV1 Lambda hiv-1 gp41 SAbDab (2026-10-02)