Phosphorylation of proteins by protein kinases and dephosphorylation by protein phosphatases represents one of the most common, versatile, and perhaps confusing regulatory mechanisms in eukaryotic cells. Many, perhaps most, proteins in the eukaryotic nucleus are phosphoproteins, among them the proteins involved in DNA replication and its control. The importance of protein phosphorylation as a r...

The dephosphorylation of phosphoproteins by protein phosphatases represents an important mechanism for regulating specific cellular processes in eukaryotic cells. The aim of the present study was to examine the structural and biochemical characteristics of a specific class of protein Ser/Thr phosphatases (type 1 protein phosphatases) which have received very little attention in higher plants. A...