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. 2021 Jan 27;153(2):e202012687. doi: 10.1085/jgp.202012687

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© 2021 Fortenbach et al.

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Figure 5. — Current clamp photovoltage responses of K_v2.1^−/− rods have greatly slowed rising phases. (A) Photovoltage family of a WT rod. (B) Photovoltage family of a K_v2.1^−/− rod. Flash strengths ranged from 8 to 800 photons μm⁻². (C) Average response versus intensity functions for photovoltage responses; smooth curves are exponential saturation functions (the flash strengths available in the slice recording apparatus were limited in range to ∼10-fold less than those used in the SE experiments; theory and experiments in other species show that the nose seen in the WT response to the strongest flash [A] is expected to reach approximately −75 mV, with relatively rapid relaxation to the approximately −55 mV plateau; Baylor and Nunn, 1986; Cobbs and Pugh, 1987; Schneeweis and Schnapf, 1995; Cangiano et al., 2012).