title: Studies on phospholipase A2 in human seminal plasma.
abstract: 1. Human seminal plasma and posterior lobe of prostate was found to have phospholipase A2 (PLA2) activity hydrolysing phosphatidylethanolamine with 14C-labelled linoleic and arachidonic acid. 2. A negative relationship was between sperm count and PLA2 activity in human seminal plasma. 3. The purified PLA2 from human seminal plasma showed high affinity to heparin, sensitivity toward p-bromophenacyl bromide, Pb2+, dithioerythritol and EDTA and it was activated by Ca2+ and Mn2+. 4. The purified PLA2 had alkaline pH optimum (7.5-10.0) and pI-value of 5.3. In SDS-PAGE enzyme preparation resulted in two bands with mol. wt of 14,000 and 16,000.
authors.affiliation: Department of Anatomy, University of Kuopio, Finland.
authors.forename: S
authors.initials: S
authors.lastname: Rönkkö
authors.forename: M
authors.initials: M
authors.lastname: Räsänen
mesh_terms: D002850:Chromatography, Gel; D004591:Electrophoresis, Polyacrylamide Gel; D006801:Humans; D008297:Male; D008970:Molecular Weight; D010741:Phospholipases A / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism*; D054467:Phospholipases A2; D011467:Prostate / Q000201:enzymology; D012661:Semen / Q000201:enzymology*
chemical_list: D010741:Phospholipases A; D054467:Phospholipases A2