BR is an alias for the gene, Integrin subunit alpha 2, in humans. Other names include: Integrin alpha-2; CD49 antigen-like family member B; Collagen receptor; Platelet membrane glycoprotein Ia; GPIa; VLA-2 subunit alpha; CD antigen CD49b; alpha 2 subunit of VLA-2 receptor; CD49B; HPA-5; VLA-2; VLAA2; integrin, alpha 2 (CD49B, alpha 2 subunit of VLA-2 receptor). The encoded protein has an amino acid length of 1181 and a mass of 129.3 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat.