Abstract
Phytase activity has been demonstrated to be widely distributed in the rat, the highest activity being found in the intestinal mucosa. The relative distribution of this enzyme parallels closely the known relative distribution of alkaline phosphatase with the exception of brain which exhibits a high phytase activity in relation to its β-glycerophosphatase activity. Mg ++ caused an increase in the phytase activity of crude homogenates from all of the tissues studied, but the degree of activation was not the same for different tissues. Hydrolysis of phytic acid and β-glycerophosphoric acid by intestinal autolyzate was nonadditive and therefore not due to the action of two enzyme systems acting independently of one another.
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