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Science 13 January 1984:
Vol. 223. no. 4632, pp. 167 - 169
DOI: 10.1126/science.223.4632.167
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Articles

Calcium-Promoted Protein Phosphorylation in Plants

K. VELUTHAMBI 1 and B. W. POOVAIAH 1

1 Department of Horticulture, Washington State University, Pullman 99164

Phosphorylation of several polypeptides in corn coleoptiles was promoted by adding calcium. Chlorpromazine, a calmodulin inhibitor, reduced calcium-promoted phosphorylation, suggesting that the phosphorylation was modulated by calmodulin. This is evidence for the role of calcium in protein phosphorylation in plants and could serve as an experimental approach to understanding the molecular mechanism by which calcium modulates various physiological processes in plants.

Submitted on October 17, 1983
Accepted on November 4, 1983


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Science. ISSN 0036-8075 (print), 1095-9203 (online)