FIGURE 1.

Flash response families of single dark-adapted control (A) and Rec^−/− (B) M-cones recorded with a suction electrode. Cone responses were evoked by a series of 500-nm test flashes (10 ms in duration). The test flash intensities (in photons μm⁻²) were 350, 1200, 4800, 1.6 × 10³, 4.4 × 10³, and 1.5 × 10⁴ for the control cone and 480, 1600, 6600, 2.2 × 10³, 5.9 × 10³, and 2.9 × 10⁴ for the Rec^−/− cone.