>6bsp_B mol:protein length:110 U4 Light chainDIVMSQSPSSLAVSVGEKVTMSCKSSQSLLYSNTQKNYLAWYQQKPGQSPKLLIYWASTRESGVPDRFTGSGSGTDFTLTISSVKAEDLAVYYCQQYYSYPLTFGAGTKL