Figure 3. Canonical scheme for Ca2+/CaM-dependent activation of myosin light chain kinase (MLCK) and phosphorylation of myosin RLC.

Ca2+/CaM-dependent MLCKs are inactive until bound to Ca2+/CaM, leading to phosphorylation of myosin RLC. Phosphorylated myosin RLC is dephosphorylated by myosin light chain phosphatases (MLCP).