>5y2m_I mol:protein length:233 a group 2 HA binding antibody AF4H1K1 Fab heavy chainQVQLVESGGGVVQPGTSLRLSCEASGFTSSAYAMHWVRQAPGKGLEWVAVITFDGGYQYYADSVKGRFTISRDISRNTLHLHMNSLRAEDTAVYYCARDPLTKLLPFDWVSGGYFDYWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKRVEPKSCDK