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Fig. 3. The effect of cadmium (50 µmol l1) and/or various
effectors on pHi of isolated digestive gland cells of Mytilus
galloprovincialis. Cells were treated with PMA, a potent activator of
protein kinase C, alone (10 nmol l1) or cadmium (50 µmol
l1) alone, or + 20 nmol l1 calphostin C (a
specific inhibitor of protein kinase C). The results are mean ±
S.D. of at least 7 independent experiments. In each
experiment, the tissue of four animals was used. *Significant
difference between the values obtained after treatment of the cells with PMA
or with cadmium and the control value at the respective time point; Dunnet's
test, P<0.01.