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. Author manuscript; available in PMC: 2009 Jul 1.
Published in final edited form as: Prog Retin Eye Res. 2008 Apr 6;27(4):450–463. doi: 10.1016/j.preteyeres.2008.03.003

Fig. 8. Ca2+-dependent depression is also present in the light responses of mammalian rod bipolar cells.

Fig. 8

A: Response to a step of saturating light in a rod-driven bipolar cell (left), and a cone-driven ON bipolar cell (right). The light response has the characteristic transient peak in the rod-driven bipolar cell, but not in the cell driven by cones. B: Response to a light step as a function of holding voltage. At positive potentials, when the driving force for Ca2+ is reduced, the depression is less pronounced. C. Averaged I-V relation measured at the times indicated by the symbols in (B). The I-V relation measured at the peak of the response is linear, but the I-V measured at steady-state rectifies outwardly as would be expected if Ca2+ influx depresses the steady-state response. From Berntson et al., 2004a.