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 6fgb H L 0 A | B protein | protein NA | NA igg receptor fcrn large subunit p51 | beta-2-microglobulin IMMUNE SYSTEM 01/10/18 Human FcRn extra-cellular domain complexed with Fab fragment of Rozanolixizumab HOMO SAPIENS homo sapiens homo sapiens homo sapiens | homo sapiens Sarkar, K., Ceska, T., Meier, C. 2.9 X-RAY DIFFRACTION 0.284 0.232 False True IGHV3 IGKV1 Kappa None None None None None