CD80 (CD80 Antigen, CD80 Molecule, Activation B7-1 Antigen, B-lymphocyte Activation Antigen B7, B7, BB1, CD28 Antigen Ligand 1 B7-1 Antigen, CD28LG, CD28LG1, Costimulatory Factor CD80, CTLA-4 Counter-receptor B7.1, LAB7, T lymphocyte Activation Antigen CD