Immunogen sequence: MDPQCTMGLS NILFVMAFLL SGAAPLKIQA YFNETADLPC QFANSQNQSL SELVVFWQDQ ENLVLNEVYL GKEKFDSVHS KYMGRTSFDS DSWTLRLHNL. CD86, along with CD80, is a member of the B7 family of costimulatory molecules and plays a crucial role in T cell activatio