[A major adhesion-associated heterodimer molecule expressed by MONOCYTES; GRANULOCYTES; NK CELLS; and some LYMPHOCYTES. The alpha subunit is the CD11C ANTIGEN, a surface antigen expressed on some myeloid cells. The beta subunit is the CD18 ANTIGEN. ( MSH )] (UMLS (CSP) C0068655) =Amino Acid, Peptide, or Protein; Immunologic Factor; Receptor