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By contrast, the k cat values of the ketosteroid isomerase activity of human, equine, and marmoset GST A3-3 are two orders of magnitude higher, ranging between 204 and 261 s 1 ( Our enzymological studies have established 5-PD and 5-AD as outstanding substrates for the equine and human GST A3-3 enzymes, and we predict that the corresponding 3-keto intermediates derived by oxidation of the 3-hydroxy groups of 17-hydroxypregnenolone and androstenediol will also be substrates, although they have not yet been tested
Escherichia coli strains were grown at 37C shaken at 170 rpm in liquid LuriaBertani (LB) broth or on solid LB medium, and ampicillin (100 g/ml), kanamycin (100 g/ml), streptomycin (100 g/ml), or chloromycetin (34 g/ml) was added when required
More studies are required to elucidate the mechanisms of action of thyroid hormones that may explain the observed differences
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