Immunogen sequence: AQSQEALQVE QRAHQAAEGQ LQACQADRQK TKETLQSEEQ QRRALEQKLS NMENRLKPFF TCGSADTCCP SGWIMHQKSC FYISLTSKNW QESQKQCETL SSKLATFSEI YPQSHSYYFL NSLLPNGGSG NSYWTGLSSN KDWKLTD. CD72 is a transmembrane glycoprotein expressed as a homodimer especiall