title: Sphingomyelin and ceramide: phosphoethanolamine synthesis in ram spermatozoa plasma membrane.
abstract: 1. The possibility for sphingomyelin and ceramide: phosphoethanolamine synthesis in ram spermatozoa plasma membranes has been established. 2. Ceramide: phosphoethanolamine formation appears to be higher than the synthesis of sphingomyelin. 3. The pH optimum of the phosphatidylethanolamine: ceramide-phosphoethanolamine transferase is about 7.0. An inhibition of its activity was observed in the presence of Ca2+ and Zn2+ ions.
authors.affiliation: Central Laboratory of Biophysics, Bulgarian Academy of Sciences, Sofia.
authors.forename: V Ts
authors.initials: VTs
authors.lastname: Hinkovska-Galcheva
authors.forename: D H
authors.initials: DH
authors.lastname: Petkova
authors.forename: M N
authors.initials: MN
authors.lastname: Nikolova
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000378:metabolism; D066298:In Vitro Techniques; D008297:Male; D010713:Phosphatidylcholines / Q000378:metabolism; D010714:Phosphatidylethanolamines / Q000378:metabolism; D012756:Sheep; D013081:Sperm Motility; D013094:Spermatozoa / Q000378:metabolism*; D013109:Sphingomyelins / Q000096:biosynthesis*
chemical_list: D010713:Phosphatidylcholines; D010714:Phosphatidylethanolamines; D013109:Sphingomyelins; C060281:ceramide phosphoethanolamine