function:Inhibitor of PPP1CA. Has over 50-fold higher inhibitory activity when phosphorylated.,PTM:Phosphorylated primarily on Thr-57 by PKC (in vitro). An unknown Ser is also phosphorylated by PKC (in vitro).,similarity:Belongs to the PP1 inhibitor family.,tissue specificity:Ubiquitous. Expressed at low levels.,
Cytoplasm .
Ubiquitous. Expressed at low levels.