>3qeh_C mol:protein length:232 Fab fragment of human anti-HIV-1 Env antibody N12-i15, heavy chainQVQLVQSGAEVRKPGASVTVSCKTSGYTFVNFYIVWVRQAPGQGLEWMGVINPFRGDTYFAQKFKGRVTLTRDTSTSTVFMELSSLRSDDTAIYYCARDLEMRDGNNHGSHLEFWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKRVEPKSCDKTH