TY - JOUR A1 - Markert, Claus A1 - Betz, Brigitte A1 - Träger, Lothar T1 - Testosterone metabolism in Streptomyces hydrogenans T2 - Zeitschrift für Naturforschung, C N2 - Testosterone, Androst-4-en-3,17-dione, Enzyme Induction, S trep to m yces hydrogenans After cultivation of S trep to m yces hydrogenan s in the presence of 3H-labelled testosterone, radio­ active steroids were extracted separately from the cytosolic, ribosomal and cell wall-membrane fraction of the cells and from the culture medium, respectively.. The separation of the steroids was performed by one-and two-dimensional thin layer chromatography (TLC). The identification of the main metabolites was achieved by crystallization to constant specific radioactivity, specific staining procedures and acetylation. The oxidation of testosterone to androst-4-en-3,17-dione is by far the predominating reaction, which is almost finished after 3 h cultivation. Androst-4-en-3,17-dione is mainly transferred into the culture medium and partly accumulated within the cell wall-membrane fraction. High polar steroid metabolites and androstane derivatives are present in very small amounts only. KW - Testosterone KW - Androst-4-en-3,17-dione KW - Enzyme Induction KW - Streptomyces hydrogenans Y1 - 2014 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/81797 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-817978 SN - 0939-5075 SN - 1865-7125 VL - 30.1975 IS - 3-4 SP - 266 EP - 270 PB - Verlag der Zeitschrift für Naturforschung CY - Tübingen ER -