Immunogen sequence: GKALEEPAND IKEDAIAPRT LPWPKSSDTI SKNGTLSSVT SARALRPPHG PPRPGALT Antigen sequence identity: Mouse 83%; Rat 83%. ESAM is a 55-kDa membrane protein composed of 2 extracellular Ig domains, a single transmembrane domain, and a 120 amino ac