title: [Localization of 17 beta-hydroxysteroid dehydrogenase in the gonads of bivalve mollusks--the sea pecten (Patinopecten yessoensis Jay) and Gray's mussel (Crenomytilus grayanus Dunker)].
abstract: Presence of 17 beta-hydroxysteroid dehydrogenase (17 beta-HSD) in testes and ovaries of the common mussels--Patinopecten yessoensis (Jay) and Crenomytilus grayanus (Dunker) has been demonstrated histochemically. The enzyme is revealed in some granular amebocytes and germ cells. In growing oocytes its activity is higher that in oocytes completed their growth. 17 beta-HSD is revealed electron microscopically near agranular endoplasmic reticulum, or on the external surface of its membranes and in globules, possessing, evidently, lipid nature. The data obtained demonstrate that synthesis and metabolism of steroid hormones are possible both in additional gonadal elements and in germ cells of the animals investigated.
authors.forename: G S
authors.initials: GS
authors.lastname: Varaksina
authors.forename: A A
authors.initials: AA
authors.lastname: Varaksin
mesh_terms: D015067:17-Hydroxysteroid Dehydrogenases / Q000378:metabolism*; D000818:Animals; D005260:Female; D006066:Gonads / Q000201:enzymology* / Q000648:ultrastructure; D006651:Histocytochemistry; D008297:Male; D008854:Microscopy, Electron; D008974:Mollusca / Q000201:enzymology* / Q000648:ultrastructure
chemical_list: D015067:17-Hydroxysteroid Dehydrogenases
vernacular_title: Lokalizatsiia 17 beta-gidroksisteroiddegidrogenazy v gonadakh dvustvorchatykh molliuskov--primorskogo grebeshka i midii Greia.