Integrin alpha4

**Definition:** An integrin alpha subunit that is unique in that it does not contain an I-domain, and its proteolytic cleavage site is near the middle of the extracellular portion of the polypeptide rather than close to the membrane, as in other integrin alpha subunits.

**Tree numbers:** - D12.776.543.750.705.408.100.450

**Synonyms:** - CD49d Antigen - alpha4 Integrin - Antigens, CD49d - CD49d Antigens