METABOLIC ACTIVITIES OF VITAMIN D IN ANIMALS

IV. DISTRIBUTION OF VITAMIN D SULFOKINASE IN ANIMAL TISSUES AND ITS ISOLATION

抄録

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.