A family of cell-surface proteins found on ANTIGEN-PRESENTING CELLS. B7 antigens are ligands for specific cell surface receptor subtypes found on T-CELLS. They play an immunomodulatory role by stimulating or inhibiting the T-CELL activation process.

Synonyms: 0, B7 Costimulatory Molecules, B7 Antigen, B7 Molecules, Antigens, B7, Antigen, B7, Costimulatory Molecules, B7, B 7 Antigen, B-7 Antigen, Antigen, B-7, Molecules, B7, B7 Antigens