fAb. AbVance: increasing our knowledge of antibody structural space to enable faster and better decision-making in antibody drug discovery.


Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
B [auth L]CSM2e5obfL1 A: alpha arraysX: PH domain-likeH: second barrel domain in viral glycoproteinsT: second barrel domain in viral glycoproteinsF: CSM2ECOD (v295.2)
A [auth H]CSM2e5obfH1 A: alpha arraysX: PH domain-likeH: second barrel domain in viral glycoproteinsT: second barrel domain in viral glycoproteinsF: CSM2ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B [auth L]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A [auth H]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

ChainProtein NameDescriptionOrganism NameGene Allele Name(s)Domain Name(s)Receptor TypeReceptor DescriptionProvenance Source
B [auth L]Antibody Fab Fragment L-KAPPA Homo sapiens (human) IGKV2-109*01, IGKV2-109*02, IGKJ1*01, IGKC*01, IGKC*02 V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA IG FAB-GAMMA-2A_KAPPA IMGT (202633-0)
A [auth H]Antibody Fab Fragment VH-CH1 Homo sapiens (human) IGHV14-2*01, IGHJ2*01, IGHG2A*01, IGHG2A*02 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-2A_KAPPA IMGT (202633-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
B [auth L]Light ChainIGKV2 Kappa-SAbDab (2026-08-28)
A [auth H]Heavy ChainIGHV14 --SAbDab (2026-08-28)