The effects of cations and pH on the phosphatase activity of a mixed enzyme system extracted from soil microorganisms

Paw A. and Hughes J.D. (1974) The effects of cations and pH on the phosphatase activity of a mixed enzyme system extracted from soil microorganisms. Soil Biology and Biochemistry, 6 1: 15-18. doi:10.1016/0038-0717(74)90005-4


Author Paw A.
Hughes J.D.
Title The effects of cations and pH on the phosphatase activity of a mixed enzyme system extracted from soil microorganisms
Journal name Soil Biology and Biochemistry   Check publisher's open access policy
ISSN 0038-0717
Publication date 1974
Sub-type Article (original research)
DOI 10.1016/0038-0717(74)90005-4
Volume 6
Issue 1
Start page 15
End page 18
Total pages 4
Subject 1111 Nutrition and Dietetics
1303 Specialist Studies in Education
2303 Ecology
Abstract Enzymes extracted from soil microorganisms exhibited activity with a number of inorganic phosphate substrates. Maximum hydrolysis of sodium and ammonium polyphosphates took place at about pH 8.5 in the presence of magnesium or manganese. Optimum cation concentrations were 2 mM for magnesium and 0.8 mM for manganese. Calcium inhibited both magnesium and manganese activation and was itself a non-activator, but an increase in the amounts of magnesium and manganese beyond their optimum concentrations reduced the inhibitory effects of calcium. There was a decrease in the rate of enzymatic hydrolysis as chain length of the polyphosphates increased, but the substrate cation had no effect.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 12 Jul 2016, 02:11:17 EST by System User