Multiple roles of protein phosphatase 4 in various cellular physiology. This schematic depicts the regions wherein PP4 participates and the genes regulated by or associated with PP4. The proteins in the closed boxes directly interact with PP4, but not all of them are targets to be dephosphorylated, whereas the proteins in the dashed boxes are indirectly regulated by PP4 or closely associated with the status of its expression. The organisms wherein the proteins are found and reference numbers are indicated; A, Arabidopsis thaliana; C, Caenorhabditis elegans; D, Drosophila melanogaster; H, human; M, mouse; N, Neurospora crassa; S, Saccharomyces cerevisiae; Sc, Schizosaccharomyces pombe; X, Xenopus laevis; Z, zebrafish.