Title: Lactase-phlorizin hydrolase complex from monkey small intestine: Stimulation of pillorizin hydrolase activity by organic acids
Abstract: Lactase-phlorizin hydrolase complex from monkey small intestine reveals a new phlorizin hydrolase activity at pH 3.3 in the presence of certain organic acids in addition to the normal activity at optimum pH 5.4. The highest stimulation (10–15 fold) was obtained with tartaric acid. Lactase activity at pH 5.3 is unaffected but its activity at pH 3.3 is inhibited by organic acids. Tartaric acid-stimulated phlorizin hydrolase activity is inhibited by a number of organic acids which have no effect on the unstimulated enzyme. Pyruvic acid inhibits the unstimulated activity as well. SO42− and Cl− ions are potent inhibitors of the tartaric acid-stimulated phlorizin hydrolase.
Publication Year: 1973
Publication Date: 1973-09-01
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
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Cited By Count: 4
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