protein kinase and phosphatase activities were studied in plasmalemma and tonoplast membrane fractions from corn ( zea mays l. ) roots in order to test the hypothesis that the tonoplast h ( + ) -atpase is regulated by intrinsic protein phosphorylation ( g zocchi , sa rogers , jb hanson 1983 plant sci lett 31 : 215-221 ) , and to facilitate future purification of kinase activities from these membranes .
C0033640
protein kinase
C1158886
protein