CD276 is a symbol for the gene, CD276 molecule, in humans. Other names include: CD276 antigen; 4Ig-B7-H3; B7 homolog 3; B7-H3; Costimulatory molecule; CD antigen CD276; B7H3; B7RP-2. The encoded protein has an amino acid length of 534 and a mass of 57.2 kDa. Other isoforms may exist. CD276 is a member of the Immunoglobulin superfamily, BTN/MOG family. This gene shares homology with other species, including: Frog.