Figure 3.
Model calculations for the three types of photoreceptors in the nocturnal M. vindex retina. The spectral sensitivities (black dots, mean ± s.e.) of the UV (a), blue (b) and green photoreceptor (c) are shown together with spectra calculated using a model (coloured lines). The spectra were modelled using three pigment templates with λmax at 365.8, 430.8 and 542.6 nm, respectively (magenta curves). The green receptor was fitted with a linear combination of two pigments templates λmax at 430.8 and 542.6 nm (dashed green curve). (Online version in colour.)