Tags: Protein.
CD22 or cluster of differentiation-22 is a molecule belonging to the SIGLEC family of lectins. It is found on the surface of mature B cells and to a lesser extent on some immature B cells. Generally speaking CD22 is a regulatory molecule that prevents the overactivation of the immune system and the development of autoimmune diseases.CD22 is a sugar binding transmembrane protein which specifically binds sialic acid with an immunoglobulin (Ig) domain located at its N-terminus.