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Bicíková, M. et al.

Inhibition of steroid 17 alpha-hydroxylase and C17,20-lyase in the human testis by epitestosterone.

Epitestosterone (17 alpha-hydroxy-4-androsten-3-one) inhibited competitively 17 alpha-hydroxylation of pregnenolone and subsequent C17,20-side chain cleavage of resulting 17 alpha-hydroxypregnenolone using microsomal preparations from the human testis. The inhibition constants for 17 alpha-hydroxylase and C17,20-lyase with 5-ene-precursors of C21-steroids were 96 and 12.4 mumol/l, respectively.[1]

References

Inhibition of steroid 17 alpha-hydroxylase and C17,20-lyase in the human testis by epitestosterone. Bicíková, M., Hampl, R., Hill, M., Stárka, L. J. Steroid Biochem. Mol. Biol. (1993) [Pubmed]

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