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Crystal Structure of Fab' from the HIV-1 Neutralizing Antibody 2F5 External Resource: Annotation Chains Family Name Domain Identifier Architecture Possible Homology Homology Topology Family Provenance Source (Version) B [auth H] Copper-bind e2pr4H1 A: alpha arrays X: Phage tail fiber protein trimerization domain H: Phage tail fiber protein trimerization domain T: Phage tail fiber protein trimerization domain F: Copper-bind ECOD (v295.2) A [auth L] DAO, NAD_binding_8 e2pr4L1 A: alpha arrays X: HTH H: HTH T: tetra-helical, lambda repressor-like F: DAO, NAD_binding_8 ECOD (v295.2)
Chain Protein Name Description Organism Name Gene Allele Name(s) Domain Name(s) Receptor Type Receptor Description Provenance Source B [auth H] 2F5 mAb, anti-gp41 membrane-proximal external region (MPER) VH-CH1 Homo sapiens (human) IGHV2-5*02, IGHJ6*01, IGHJ6*02, IGHG1*03 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_KAPPA IMGT (202637-0) A [auth L] 2F5 mAb, anti-gp41 membrane-proximal external region (MPER) L-KAPPA Homo sapiens (human) IGKV1D-13*01, IGKV1-13*02, IGKJ3*01, IGKJ4*01, IGKJ4*02, IGKC*01 V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA IG FAB-GAMMA-1_KAPPA IMGT (202637-0)
Chain Chain Class Chain Subclass Chain Type Antigen Name(s) Provenance Source B [auth H] Heavy Chain IGHV2 - - SAbDab (2026-09-25) A [auth L] Light Chain IGKV1 Kappa - SAbDab (2026-09-25)