while the in vitro phosphorylation of pepcase from illuminated maize leaves by an endogenous protein kinase resulted in a partial inactivation ( approximately 25 % ) of the enzyme when assayed at ph 7 and subsaturating levels of pep , effector modulation by l-malate and glucose-6-phosphate was relatively unaffected .
C0031715
phosphorylation
C0033640
protein kinase