pdb Hchain Lchain model antigen_chain antigen_type antigen_het_name antigen_name short_header date compound organism heavy_species light_species antigen_species authors resolution method r_free r_factor scfv engineered heavy_subclass light_subclass light_ctype affinity delta_g affinity_method temperature pmid 5ggv H L 0 Y protein NA cytotoxic t-lymphocyte protein 4 IMMUNE SYSTEM 06/16/16 CTLA-4 in complex with tremelimumab Fab HOMO SAPIENS; SYNTHETIC CONSTRUCT homo sapiens homo sapiens homo sapiens Heo, Y.S. 1.998 X-RAY DIFFRACTION 0.214 0.181 False True IGHV3 IGKV1 Kappa None None None None None