![Figure 3. Effects of [K]o manipulations on the amplitude of the light-evoked current. (A) A Hesse cell was voltage clamped and stimulated repetitively; the photocurrent size changed marginally as the extracellular potassium concentration was changed from 10 mM to either 2 or 50 mM. A fixed flash intensity was used throughout (2.8 × 1013 photons/cm2), and the holding potential was set at −50 mV. (B) Peak photocurrent amplitude normalized with respect to the value obtained at [K]o = 10 mM, averaged for three Hesse cells tested under the three ionic conditions. Error bars indicate SEM.](https://cdn.rupress.org/rup/content_public/journal/jgp/139/1/10.1085_jgp.201110717/4/jgp_201110717_fig3.jpeg?Expires=1767692009&Signature=D0JU-8F3RRInxLWQwf2XqdCn6h-11cMi1zxGSMlgkDdwAH913q-JYST2OfR7auDnq7CyDZ8ovqo4myz5zP59vBO~SKzW9VrPfPndSIfb4VnKya5q9UOQ25TNiFAjwfVQQE2z5uzPKRLLJp01o85yOUp6tQiaSCjJmk~gDEB7aqMcoUboU9Zgu8H65ylgYvKf~9JjS2AWrR4hv-r43cWNkkEzaJz85Gf4dyV~oruY59LScfB3yuXROZfKaTDrjweqEGxwUXDBdE5hs0~e18vCCIfcWUp1auuZMJOvpHdAVOQQdUYf2~Dscn6KohxMPFZpGkmSsRpLgxOwFBVGHfX9Zg__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Figure 3.
Effects of [K]o manipulations on the amplitude of the light-evoked current. (A) A Hesse cell was voltage clamped and stimulated repetitively; the photocurrent size changed marginally as the extracellular potassium concentration was changed from 10 mM to either 2 or 50 mM. A fixed flash intensity was used throughout (2.8 × 1013 photons/cm2), and the holding potential was set at −50 mV. (B) Peak photocurrent amplitude normalized with respect to the value obtained at [K]o = 10 mM, averaged for three Hesse cells tested under the three ionic conditions. Error bars indicate SEM.
