title: Progesterone metabolism by the echinoderms Asterias rubens and Marthasterias glacialis.
abstract: The echinoderms Asterias rubens and Marthasterias glacialis metabolize injected [4-(14)C]progesterone to give labelled 3beta-hydroxy-5alpha-pregnan-20-one and 3beta,6alpha-dihydroxy-5alpha-pregnan-20-one. These radioactive products are converted by the animals into conjugated forms that are soluble in aqueous methanol, and which have mobilities on t.l.c. similar to the asterosaponins.
mesh_terms: D000818:Animals; D002250:Carbon Radioisotopes; D002855:Chromatography, Thin Layer; D006914:Hydroxysteroids; D011278:Pregnanes; D011374:Progesterone / Q000378:metabolism*; D012503:Saponins / Q000032:analysis; D013045:Species Specificity; D013215:Starfish / Q000378:metabolism*
chemical_list: D002250:Carbon Radioisotopes; D006914:Hydroxysteroids; D011278:Pregnanes; D012503:Saponins; D011374:Progesterone