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Effect of pH on the activity of ryegrass Lolium multiflorum proteases
Author(s) -
Heron Shirley J E,
Edwards R Alun,
Phillips Patricia
Publication year - 1989
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740460304
Subject(s) - lolium multiflorum , proteases , proteolysis , protease , chemistry , silage , lolium , agronomy , food science , poaceae , biochemistry , enzyme , biology
The effect of pH on plant protease activity was investigated using buffered, gamma‐irradiated aqueous extract of ryegrass Lolium multiflorum . Rapid protein breakdown occurred in the first few days but was followed by a longer period of reduced activity. The overall pH optimum for ryegrass proteases was between 5·0 and 7·0 but there was still considerable activity at the acid pH levels found, eg in silage. Proteolysis did not proceed to completion even when the pH was not inhibiting.