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Fig. 8. Representative recording of the basolateral membrane voltage
(Vb) in a principal cell challenged sequentially with 100
nmol l1 Anoga-DH31, 100 nmol l1
Anoga-DH44 and 100 µmol l1 8-bromo-cyclic AMP.
Note that only Anoga-DH44 gives a triphasic response beginning with
a brief hyperpolarisation. Horizontal bars indicate when peptides or cyclic
AMP analogue were present in the bath. Arrows show when the principal cell was
impaled (downward arrow) and the microelectrode withdrawn (upward arrow).