>4ppt_A mol:protein length:121 Engineered single domain VHH antibodyQVQLVESGGGLVQAGGSLRLSCAASGYPHPYLHMGWFRQAPGKEREGVAAMDSGGGGTLYADSVKGRFTISRDKGKNTVYLQMDSLKPEDTATYYCAAGGYELRDRTYGHWGQGTQVTVSS