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Fig. 5. Doseresponse of the effects of cGMP on the basolateral membrane
voltage Vbl (A), and the input resistance
Rpc (B) of principal cells in isolated Malpighian tubules
of A. aegypti. The insert in A illustrates the usual biphasic
response of Vbl to 500 µmol l1 cGMP.
Values are means ± S.E.M.; the number of principal cells is
indicated for each data point; *P<0.05, paired
Student's t-test. Open circles, steady state depolarization; closed
circles, peak depolarisation.