Steroidtransformation mit immobilisierten Mikroorganismen. II. Abbau der Seitenkette von Cholesterol mit immobilisierten Zellen von <i>Nocardia erythropolis</i>

Abstract

Abstract The degradation of cholesterol side chain was studied by immobilized cells of Nocardia erythropolis in the presence of an inhibitor of the microbial steroid‐skeleton‐degradation. Different immobilized preparations such as DEAE‐cellulose adsorbates, ionic cross‐linked polymer gels, i.e. , A1/Coalginates and polyacrylates, respectively, and polyethylene maleic acid anhydride supports have shown a high transformation activity yielding the C 22 ‐ and C 19 ‐degradation products. No side chain degradation activity could be observed after immobilization of the cells in polyacrylamide gel under usual conditions caused by the toxic effect of the acrylamide monomer on the Nocardia cells.