Anti-Integrin, alpha 4 antibodies are protein reagents that detect specific antigens. The Integrin, alpha 4 antigen is another term for the human protein integrin subunit alpha 4, encoded by the ITGA4 gene. The protein is known to function in B cell differentiation and cell adhesion, among other biological roles. Canonically, it has an amino acid length of 1032 residues and a mass of 114.9 kilodaltons. Its subcellular localization is in the membrane. The Integrin, alpha 4 protein is a member of the Integrin alpha chain protein family. Other alias names for Integrin, alpha 4 include CD49D, IA4, and integrin alpha-4.