title: Metabolism in porifera. VII. Conversion of [7,7-3H2]-fucosterol into calysterol by the sponge Calyx niceaensis.
abstract: The sponge Calyx niceaensis metabolizes administered [7,7--(3)H2]-fucosterol to produce labelled calysterol, the principal sterol component of the sponge, possessing the unique feature of a cyclopropene ring bridging C23,24.
mesh_terms: D000818:Animals; D003521:Cyclopropanes / Q000378:metabolism; D010840:Phytosterols / Q000378:metabolism; D011161:Porifera / Q000378:metabolism*; D013261:Sterols / Q000096:biosynthesis*; D013265:Stigmasterol / Q000031:analogs & derivatives
chemical_list: D003521:Cyclopropanes; D010840:Phytosterols; D013261:Sterols; C015896:fucosterol; C015729:calysterol; D013265:Stigmasterol