Figure 4.

Recovery phase of the waveform. (A-B) The recovery phase of the averaged waveform data for WT rod and Gnat1^−/−;GCAPs^−/− cone from Fig. 2 (black curves) were fitted with a single exponential function to extract the recovery rates constants μ_rec (red curves). The fitted values are μ_rec = 4.9s⁻¹ for WT rod, and μ_rec = 11.9⁻¹ for Gnat1^−/−;GCAPs^−/− cone. (C-D) The curves show the individual single exponentials related to rhodopsin decay, transducin decay, PDE decay and the cyclase rate constant β that contribute to the waveform ${\widehat{g}}_y= {\widehat{g}}_{y,rh}+{\widehat{g}}_{y,tr}+{\widehat{g}}_{y,pde}+{\widehat{g}}_{y,\beta }$ computed with Eq. 9 for a WT rod (C) and a GCAPs^−/− rod (D) .