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THE JOURNAL OF VITAMINOLOGY
Vol. 11 (1965) No. 4 P 266-270

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http://doi.org/10.5925/jnsv1954.11.266


1. The distribution of vitamin D sulfate in animal tissues was studied. Considerable amounts of the sulfate were formed in the liver, but extremely poor in other tissues.
2. Vitamin D-sulfokinase was isolated from rat-liver homogenate, and the optimum conditions were investigated.
3. Isotopic investigation for the biogenesis of vitamin D sulfate was carried out using the vitamin D-sulfokinase preparation.
The activity of the vitamin D2-sulfokinase preparation obtained by the authors was estimated to be 3.3% as estimated from the yield of vitamin D2 sulfate from the vitamin D2 employed.

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