title: Purification and characterization of human plasma lecithin:cholesterol acyltransferase.
abstract: A highly purified (approximately 12 000-fold) homogeneous preparation of human plasma lecithin:cholesterol acyltransferase (LCAT) with 16% yield was obtained by a combination of density ultracentrifugation, high density lipoprotein affinity column chromatography, hydroxylapatite chromatography, and finally chromatography on anti-apolipoprotein D immunoglobulin-Sepharose columns to remove apolipoprotein D. This enzyme preparation was homogeneous by the following criteria: a single band by polyacrylamide gel electrophoresis in 8 M urea; a single band on sodium dodecyl sulfate gel electrophoresis with an apparent molecular weight of 68 000 +/- 1600; a single protein peak with a molecular weight of 70 000 on a calibrated Sephadex G-100 column. Its amino acid composition was different from human serum albumin and all other apoproteins isolated from lipoprotein fractions.
mesh_terms: D000217:Acyltransferases / Q000097:blood*; D000596:Amino Acids / Q000032:analysis; D002846:Chromatography, Affinity; D006801:Humans; D008970:Molecular Weight
chemical_list: D000596:Amino Acids; D000217:Acyltransferases