Purification of circulating liver plasma membrane fragments using a monoclonal antileucine aminopeptidase antibody
J T Deng, M F Hoylaerts, E J Nouwen, M E De Broe, V O Van Hoof – 1 March 1996 – Membrane‐bound liver alkaline phosphatase (Mem‐LiALP, EC 3.1.3.1) is a high‐molecular‐mass liver alkaline phosphatase (ALP) present in metastatic, infiltrative and cholestatic liver disease. Shedding of hepatocyte plasma membrane fragments (LiPMF) is thought to be responsible for the appearance of Mem‐LiALP in the circulation. Several other membrane‐bound enzymes, such as γ‐glutamyltransferase (γ‐GT), leucine aminopeptidase (LAP), and 5′‐nucleotidase (5′‐Nu) are present in the membrane of the shedded LiPMF.