Immunogen sequence: DVVVQAPTQV PGFLGDSVTL PCYLQVPNME VTHVSQLTWA RHGESGSMAV FHQTQGPSYS ESKRLEFVAA RLGAELRNAS LRMFGLRVED EGNYTCLFVT FP. The protein encoded by this gene is a transmembrane glycoprotein belonging to the immunoglobulin superfamily. The extern