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In enzymology, a 5-phytase () is an enzyme that catalyzes the chemical reaction :myo-inositol hexakisphosphate + H2O 1L-myo-inositol 1,2,3,4,6-pentakisphosphate + phosphate Thus, the two substrates of this enzyme are myo-inositol hexakisphosphate and H2O, whereas its two products are 1L-myo-inositol 1,2,3,4,6-pentakisphosphate and phosphate. This enzyme belongs to the family of hydrolases, specifically those acting on phosphoric monoester bonds. The systematic name of this enzyme class is myo-inositol-hexakisphosphate 5-phosphohydrolase. ==Prevalence== Of the hundreds of phytase enzymes that have been characterized in the literature, only two have been characterized as 5-phytases. A histidine acid phosphatases purified from lily pollen and a protein tyrosine phosphatase-like phytase from ''Selenomonas ruminantium'' subsp. ''lactilytica''〔 were both found to have specificity for the 5-phosphate position of myo-inositol hexakisphosphate. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「5-phytase」の詳細全文を読む スポンサード リンク
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