Immunogen sequence: NASLAQVVMK VDVVYEKQML YLYVLSGIGG LLLLLLIFIV LYKVGFFKRN LKEKMEAGRG VPNGIPAEDS EQLASGQEAG DPGCLKPLHE KDSESGGGKD. CD11a (LFA-1 alpha, ITGAL) together with CD18 constitute leukocyte function-associated antigen 1 (LFA-1), the alphaLbeta2 i