ビタミンD代謝の生化学的研究 : (IX)動物乳汁より水溶性ビタミンD硫酸エステルの分離と同定

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In the previous papers, the authors have reported with respect to possible metabolisms of vitamin D-sulfate. The biogenesis of vitamin D-sulfate and isolation of vitamin D-sulfokinase in animal tissues were confirmed. Recently, the authors have attempted to elucidate whether there may be possible occurrence of water-soluble vitamin D-sulfate in fresh mammalian milks. The water-soluble vitamin D-sulfate was isolated from aqueous solution of fresh proteinfree milk as water-insoluble barium vitamin D-sulfate and then estimated to be about 950 I.U./l of fresh human milk by thin layer chromatography and spectrography, while as in lipidsoluble form only about 16.7I.U./l. In case of fresh cow milk, it was realized to be about 204 I.U./l in water-soluble form, whereas about 36 I.U./l in lipid-soluble form.
日本ビタミン学会の論文
1966-11-25