Immunogen sequence: QNLVSGWLSD LQTHTWDSNS STIVFLCPWS RGNFSNEEWK ELETLFRIRT IRSFEGIRRY AHELQFEYPF EIQVTGGCEL HSGKVSGSFL QLAYQGSDFV SFQNNSWLPY PVAGNMAKHF CKVLNQNQHE ND. CD1a is a non-polymorphic MHC Class 1 related cell surface glycoprotein, expressed in a