Immunogen sequence: APFDVIGPPE PILAVVGEDA ELPCRLSPNA SAEHLELRWF RKKVSPAVLV HRDGREQEAE QMPEYRGRAT LVQDGIAKGR VALRIRGVRV SDDGEYTCFF REDGSYEEAL VHLKVAALGS DPHISMQVQE NGEICLECTS VGWYPEPQVQ WRTSKGEKFP STSESRNPDE EGLFTVAASV IIRD. BTN1A1 (Butyrophilin) is the m