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Fig. 4. Effect of in vitro incubations to stimulate the activities of
endogenous (A) protein kinases and (B) protein phosphatases on
Na+/K+-ATPase activity in foot muscle extracts from
active and 10-day estivated O. lactea. Incubation time was 4 h prior
to assay under Vmax conditions at 22°C. Values are
means ± s.e.m., N=4 independent determinations.
*Significantly different from the corresponding control incubation;
Student's t-test, P<0.01;
P<0.05. For details of incubation conditions,
see Materials and methods.