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. 1998 Nov;118(3):1015–1020. doi: 10.1104/pp.118.3.1015

Table II.

Effect of different concentrations (mm) of sodium-potassium tartrate on phosphatase activity

0 mm 10 mm 50 mm 100 mm 200 mm 400 mm 600 mm
μmol min−1 mg−1 protein
640  (100%) 530  (82%) 550  (86%) 520  (81%) 490  (77%) 480  (75%) 430  (67%)

The activity was assayed using p-nitrophenylphosphate as a substrate at pH 8.0.