Annotations: 8TV3

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth H]	F5_F8_type_C	e8tv3H01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: F5_F8_type_C	ECOD (v294.2)
A [auth L]	F5_F8_type_C	e8tv3L01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: F5_F8_type_C	ECOD (v294.2)

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B [auth H]	Fab 221-5	1C-1C-LIKE-CH2-CH3	Homo sapiens (human), Borreliella burgdorferi (Lyme disease spirochete)	IGHV5-5101, IGHV5-5103, IGHJ603, IGHJ601, IGHG103, IGHG108, IGHG106, IGHG117	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202617-0)
A [auth L]	Fab 221-5	L-KAPPA	Homo sapiens (human), Borreliella burgdorferi (Lyme disease spirochete)	IGKV3-1101, IGKJ201, IGKJ202, IGKC01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202617-0)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV5	-	outer surface protein a	SAbDab (2026-05-08)
A [auth L]	Light Chain	IGKV3	Kappa	outer surface protein a	SAbDab (2026-05-08)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth A]	Outer surface protein A	-	-	cell surface cellular anatomical structure membrane cell outer membrane external encapsulating structure extracellular region cell envelope outer membrane
B [auth H]	Heavy chain of human monoclonal Fab 221-5	-	-	-
A [auth L]	Light chain of human monoclonal Fab 22105	-	-	-