FIGURE 1.

Traces of representative currents photoinduced via pHR expressed heterologously in pHR-expressing Xenopus oocytes were superfused with standard buffer containing different anions (as sodium salts) at a concentration of 100 mM. The hatched bars below the current traces indicate the period (10 s) of illumination with green light (530 ± 18 nm). In control oocytes with no pHR expression, there were no detectable currents in response to light pulses (data not shown).