these in vitro results , together with our recent studies on the light-induced changes in phosphorylation status of green maize leaf pepcase in vivo ( j. a. jiao and r. chollet ( 1988 ) arch . biochem . biophys . 261 , 409-417 ) , collectively provide the first unequivocal evidence that the seryl-phosphorylation of the dark-form enzyme by a soluble protein kinase is responsible for the changes in catalytic activity and malate sensitivity of c4 pepcase observed in vivo during dark/light transitions of the parent leaf tissue .
C0031715
phosphorylation
C0033640
protein kinase