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. 2005 Dec 1;571(Pt 1):15–26. doi: 10.1113/jphysiol.2005.099135

Figure 1. Typical data from a pH gradient experiment.

Figure 1

ISC, short-circuit current; pH, apical chamber pH; IH, short-circuit current attributable to transepithelial pH gradient. Arrows indicate time points at which NaOH was added to the apical chamber.