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 7qbd E NA 0 B | A protein | protein NA | NA transcobalamin-2 | transcobalamin-2 TRANSPORT PROTEIN 11/19/21 TC:CD320 in complex with nanobody TC-Nb26 HOMO SAPIENS; VICUGNA PACOS vicugna pacos homo sapiens | homo sapiens Bloch, J.S., Locher, K.P. 4.18 X-RAY DIFFRACTION 0.272 0.262 False True IGHV1 NA NA None None None None None