title: Sterols and their biosynthesis in some freshwater bivalves.
abstract: A number of free sterols and sterol esters of three freshwater mussels was separated and identified. A slow rate of biosynthesisde novo of sterols was demonstrated inAnodonta cygnea. Injected cholesterol was found to undergo esterification, oxidation, Δ(22)-dehydrogenation and C-24 alkylation. Methyl-[(14)C]methionine was proved to be incorporated in C-24 alkylsterols. Abnormally large amounts of cholesterol injected inA. cygnea were metabolized toward restoration of the normal composition of sterols. This was achieved by intensified metabolism of cholesterol, mainly by conjugation, oxidation and Δ(22)-dehydrogenation.
authors: Institute of Organic Chemistry and Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria.
authors: S
authors: S
authors: Popov
authors: Institute of Organic Chemistry and Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria.
authors: I
authors: I
authors: Stoilov
authors: Institute of Organic Chemistry and Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria.
authors: N
authors: N
authors: Marekov
authors: Research Institute of Mineral Resources, 1113, Sofia, Bulgaria.
authors: G
authors: G
authors: Kovachev
authors: Museum of Natural History, 1000, Sofia, Bulgaria.
authors: S
authors: S
authors: Andreev