This study focuses on the characterization of protein phosphorylation in the gravitropic response in oat shoot pulvini through the use of inhibitors of this process, namely staurosporine, okadaic acid and sodium fluoride. These three inhibitors reduce gravitropic curvature and cause changes in the phosphorylation of 38- and 50-kDa soluble proteins which show different levels of phosphorylation between...
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