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Rv1106c (hsd; 3β-hydroxysteroid dehydrogenase) is required by Mycobacterium tuberculosis for growth on cholesterol as a sole carbon source, whereas Rv3409c is not. Mutation of Rv1106c does not reduce Mycobacterium tuberculosis growth in infected macrophages or guinea pigs. We conclude that cholesterol is not required as a nutritional source during infection.
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Yang et al. (2011) studied this question.
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