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Updated: Aug 14, 2026

Free Radicals in Chemical Biology: from Chemical Behavior to Biomarker Development
Published on: April 15, 2013
Transformation of 25-Hydroxycholesterol by Rhizoctonia muneratii
M E Wozny1, T R Smith, R L Angus
1Borg-Warner Chemicals, Inc., Technical Centre, Washington, West Virginia 26181; and Chemistry Department, University of Chicago, Chicago, Illinois 60637.
Abstract:
Rhizoctonia muneratii ATCC 13247 was capable of catalyzing the conversion of 25-hydroxycholesterol to the 3-oxo-4-ene. Hydroxylation at the 6alpha and 6beta positions with the concomitant 3-oxo-4-ene transformation was also observed. The addition of Triton X-100 to the growth medium immediately before steroid addition selectively prevented the appearance of the respective 6alpha-hydroxylated products. The observed conversions were indicative of the utility of microbial transformations in preparing hydroxylated steroids which can be useful for further synthetic modification or for study as pharmacological agents.
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