The human cell surface glycoprotein HuLy-m5, membrane cofactor protein (MCP) of the complement system and trophoblast leucocyte common (TLX) antigen are CD46 - Purcell, D F J; Mckenzie, I F C; Lublin, D M; Johnson, P M; Atkinson, J P; Oglesby, T J; Deacon, N J (Immunol, 1990)