the alpha protein subunit that forms with CD18 the heterodimeric integrin macrophage-1 antigen (Mac-1) also known as complement receptor 3 (CR3), present on the surface of many leukocytes involved in the innate immune system

a transmembrane cell-surface sialoglycoprotein on certain immune cells, defective in Wiskott-Aldrich syndrome

glycoprotein found on the surface of many immune cells (white blood cells), including CD4+, CD8+, B lymphocytes and natural killer cells, functioning in cell adhesion, signal transduction and calcium signaling

a proto-oncogene, mutations possibly leading to acute myelogenous leukemia (AML) and carrying an adverse prognosis.

a molecule found on the surface of mature B cells and to a lesser extent on some immature B cells, helping to prevent the overactivation of the immune system and the development of autoimmune diseases

a carbohydrate adhesion molecule that can be expressed on glycoproteins, glycolipids and proteoglycans, mediating phagocytosis and chemotaxis; used as a marker in mostly hematologic malignancies

a transmembrane (type I) heparan sulfate proteoglycan, participating in cell proliferation, migration and cell-matrix interactions.

a transmembrane receptor expressed on blood cells of myeloid lineage, though also found on some lymphoid cells

a zinc-dependent metalloprotease, expressed in a wide variety of tissues, especially in kidney and on pre-B lymphocytes

a costimulatory protein found on antigen presenting cells and required for their activation by CD154 of T_H cells, with deficiency of CD40 possibly leading to hyper-IgM syndrome type 3.