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Fig. 9
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Figure Caption
Figure 9. Representative traces of currents elicited by voltage steps protocol applied to Xenopus oocytes expressing the Atlantic salmon PepT2 transporters, PepT2a (top) and PepT2b (bottom)
The voltage pulses were in the range −140 to +20 mV. At all tested pH, the presence of saturating concentrations of Gly-Gln (1 mmol l−1 for PepT2a and 0.3 mmol l-1 for PepT2b) eliminates the transporter transient component (IPSS) and produces large inwardly directed steady-state currents that raise increasing the proton chemical gradient and in hyperpolarization.
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Full text @ J. Physiol.