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Crystal Structure of TcdA-A2 Bound to Two Molecules of A20.1 VHH External Resource: Annotation Chains Family Name Domain Identifier Architecture Possible Homology Homology Topology Family Provenance Source (Version) C EF-hand_1,S_100 e4nbyC1 A: alpha arrays X: dsRBD-like H: Peptidyl-tRNA hydrolase domain-like T: Peptidyl-tRNA hydrolase domain-like F: EF-hand_1,S_100 ECOD (v295.2) B EF-hand_1,S_100 e4nbyB1 A: alpha arrays X: dsRBD-like H: Peptidyl-tRNA hydrolase domain-like T: Peptidyl-tRNA hydrolase domain-like F: EF-hand_1,S_100 ECOD (v295.2) A VanY e4nbyA1 A: alpha arrays X: MHC antigen-recognition domain H: MHC antigen-recognition domain T: MHC antigen-recognition domain F: VanY ECOD (v295.2)
Chain Protein Name Description Organism Name Gene Allele Name(s) Domain Name(s) Receptor Type Receptor Description Provenance Source A20.1 VHH VH Lama glama (llama) IGHV3S3*01, IGHJ4*01 V-DOMAIN VH IG (VH) IMGT (202640-0)
Chain Chain Class Chain Subclass Chain Type Antigen Name(s) Provenance Source Heavy Chain IGHV1 - cell wall-binding repeat protein SAbDab (2026-10-16)