GPIIIa, or Integrin subunit beta 3, is a human gene encoded by ITGB3. It may also be known as: Integrin beta-3; Platelet membrane glycoprotein IIIa; CD antigen CD61; platelet glycoprotein IIIa; antigen CD61; BDPLT16; BDPLT2; CD61; GP3A; integrin, beta 3 (platelet glycoprotein IIIa, antigen CD61). The encoded protein has an amino acid length of 788 and a mass of 87.1 kDa. Other isoforms may exist. Homologs of this gene exist in other organisms, including: Mouse.