HHLA2 Polyclonal Antibody for Western Blot, IHC (P), Flow B7-H7 (also known as HHLA2) is a membrane protein with three Ig-like domains (IgV-IgC-IgV), whereas other members of the B7 family generally have only two Ig domains (IgV-IgC). B7-H7 is somewhat m