Effect of phytate on the in vitro activity of digestive proteinases

Phytate inhibits the action of pepsin on the proteins but does not affect the pepsin hydrolysis of a low molecular weight substrate, acetyl-L-phenylalanyl-3,5-diioclo-L-tyrosine. The inhibition is maximal at pH 2-3 and drops to zero when the pH is increased to 4.0-4.5. Trypsin hydrolysis of both a l...

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