PPP1R14A (Protein phosphatase 1 regulatory subunit 14A) is a phosphorylation-dependent inhibitory protein for smooth muscle myosin phosphate. Myosin phosphatase can reverse MYL (myosin light chain) phosphorylation to induce a state of relaxation. However, during agonist-induced contraction at constant Ca2+ concurrent inhibition of myosin phosphatase leads to increases in MYL phosphorylation and tension. These calcium-independent increases in myosin phosphorylation and tension are termed calcium sensitization. Recombinant His tagged PPP1R14A was expressed in E.coli and purified by using conventional chromatography techniques. Synonyms: CPI17, CPI-17, PPP1INL, Protein phosphatase 1, regulatory (inhibitor) subunit 14A, PPP1R14A , Protein phosphatase 1, regulatory (inhibitor) subunit 14A CPI 17, CPI 17 alpha, CPI 17alpha, CPI17, PKC potentiated inhibitory protein of PP1, Protein phosphatase 1 regulatory (inhibitor) subunit 14A, Protein phosphatase 1 regulatory subunit 14A, Regulatory subunit 14A,. NCBI no.: NP_150281