sentences:  The αEβ7 complex is often referred to as "CD103" though this strictly refers only to the αE chain.Note that the β7 subunit can bind with other integrin α chains, such as α4 (CD49d).CD103 is expressed widely on intraepithelial lymphocyte (IEL) T cells (both αβ T cells and γδ T cells) and on some peripheral regulatory T cells (Tregs).