Immunogen sequence: AQGDTYWYHD EKLLKIKHDK IQITEPGNYQ CKTRGSSLSD AVHVEFSPDW LILQALHPVF EGDNVILRCQ GKDNKNTHQK VYYKDGKQLP NSYNLEKITV NSVSRDNSKY HCTAYRKFYI LDIEVTSKPL NIQ. This gene encodes a member of the immunoglobulin receptor superfamily and is one of se