Figure 3. Delay of the response to bright flashes in cones is shorter than in rods. Suction pipette recordings from Carassius red-sensitive cone and from Rana ridibunda rhodopsin rods are shown. Here and throughout, experimental photoresponses are expressed as fractional with respect to the dark current (for suction recordings) or to the amplitude of the saturated response (for transretinal recordings). Recording bandpass, digitization, and flash duration are as indicated in Methods. Flash intensity is expressed as fractional bleach: Cone, 1.4·10⁻⁴; Rod, 3.9·10⁻⁵. Rates of the cascade activation ν_RE shown near the curves are derived from the minimum essential model (MEM) fitting.