Alkaline phosphatase inhibition by copper: Implications to phosphorus nutrition and use as a biochemical marker of toxicity 1 | Zendy

Rueter John G. | Zendy

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Alkaline phosphatase inhibition by copper: Implications to phosphorus nutrition and use as a biochemical marker of toxicity 1

Author(s) -

Rueter John G.

Publication year - 1983

Publication title -

limnology and oceanography

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.7

H-Index - 197

eISSN - 1939-5590

pISSN - 0024-3590

DOI - 10.4319/lo.1983.28.4.0743

Subject(s) - alkaline phosphatase , enzyme , enzyme assay , biochemistry , copper , chemistry , phytoplankton , phosphorus , phosphatase , toxicity , biology , environmental chemistry , nutrient , ecology , organic chemistry

Alkaline phosphatase activity is inhibited by copper in phytoplankton cultures, cell‐free enzyme preparations, and natural populations of phytoplankton. Inhibition in all these systems is rapid and a function of cupric ion activity, supporting the hypothesis that the cellular enzyme is directly exposed to the aqueous medium. These characteristics of the enzyme allow two applications: purified bacterial enzyme can be used to assay the cupric ion activity in filtered water samples, and the inhibition of the activity in natural populations is a biochemical marker for overall toxicity.

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