T
Tamaoki Bun-Ichi
Researcher at National Institute of Radiological Sciences
Publications - 21
Citations - 383
Tamaoki Bun-Ichi is an academic researcher from National Institute of Radiological Sciences. The author has contributed to research in topics: Dehydrogenase & Enzyme. The author has an hindex of 11, co-authored 21 publications receiving 382 citations.
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Journal ArticleDOI
The influence of various factors upon testicular enzymes related to steroidogenesis.
TL;DR: Some regulatory role for the 20α-hydroxysteroid dehydrogenase, and the products of its action, upon androgen synthesis are suggested, according to rat testicular microsomal fraction findings.
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Purification and characterization of rat adrenal 3β-hydroxysteroid dehydrogenase with steroid 5-ene-4-ene-isomerase
TL;DR: After solubilization of rat adrenal microsomes with sodium cholate, 3 beta-hydroxysteroid dehydrogenase with steroid 5-ene-4-ene isomerase activity was purified to a homogeneous state and the following characteristics of the enzyme were obtained.
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Testicular and adrenal 3β-hydroxy-5-ene-steroid dehydrogenase and 5-ene-4-ene isomerase
TL;DR: The results suggest that in these endocrine organs, both enzyme activities reside within the same protein, probably as an allosteric effector.
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Testosterone metabolism in rooster comb.
TL;DR: Androgenic activity of 5α-dihydrotestosterone upon the comb was significantly reduced by simultaneous administration of 5β-diluted testosterone, and androgenic activities of 3α- and 3β-hydroxysteroid dehydrogenases in the cytosol and microsomal fractions of the comb were significantly reduced.
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Studies on enzyme reactions related to steroid biosynthesis: II. submicrosomal distribution of the enzymes related to androgen production from pregnenolone and of the cytochrome P-450 in testicular gland of rat
TL;DR: The enzyme activities of the submicrosomal fraction which were diminished by the gradient centrifugation were largely restored by addition of the heated 105,000 × g supernatant fluid.