Fig. 10.

Analysis of individual red receptors. a Fits of the sum of double Gaussian functions to the sensitivity profiles of the eight receptors from the red class with the provisional division into the nR subclass (black) and fR subclass (red). Dots show the experimental data. Thin lines show fits to individual cells and thick lines show the fits to the joined data from six nR cells (black) and two fR cells (red). b The relation between the peak position estimates (circles), the left cutoff estimates (WLHM; crosses) and the relative amplitude of the secondary peak at 480 nm (y-axis) (colour figure online)