Immunogen sequence: NMGKLKQEMG GIVTELIRDY NSSREDSLQD AWDYVQAQVK CCGWVSFYNW TDNAELMNRP EVTYPCSCEV KGEEDNSLSV RKGFCEAPGN RTQSGNHPED WPVYQEGC. This metastasis suppressor gene product is a membrane glycoprotein that is a member of the transmembrane 4 superfa