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 5l21 B NA 0 A protein NA botulinum neurotoxin type a TOXIN 07/29/16 Crystal structure of BoNT/A receptor binding domain in complex with VHH C2 CLOSTRIDIUM BOTULINUM (STRAIN HALL / ATCC 3502 / NCTC 13319 / TYPE A); VICUGNA PACOS vicugna pacos clostridium botulinum (strain hall / atcc 3502/ nctc 13319 / type a) Yao, G., Jin, R. 1.68 X-RAY DIFFRACTION 0.205 0.193 False True unknown unknown unknown None None None None None