myosin light chain kinase ( 0.15 microm ) and calmodulin ( 2 microm ) were added , and the fibers were incubated at pca 5.4 , which resulted in an increase in light chain phosphorylation ( p-light chain ) from 5-10 to 60-75 % .
C0027120
myosin light chain kinase
C0031715
phosphorylation