myosin light chain kinase can also phosphorylate threonine 18 in addition to serine 19 , and this phosphorylation resulted in an increase in the actin-activated mgatpase activity ( ikebe , m. , and hartshorne , d.j . ( 1985 ) j. biol . chem . 260 , 10027-10031 ) .
C0027120
myosin light chain kinase
C0031715
phosphorylation