when the l-pk phosphorylation state was studied indirectly in liver extracts by kinetic measurement , it was found that , during the perfusion , the s0.5 of phosphoenol pyruvate ( pep ) for l-pk was decreased in a time-dependent manner from 1 +/- 0.08 to 0.64 +/- 0.1 mm ( p less than 0.01 ) and 0.58 +/- 0.06 mm in liver cells .
C0031715
phosphorylation
C0034348
l-pk