Fig. 1From: Spectral tuning mediated by helix III in butterfly long wavelength-sensitive visual opsins revealed by heterologous action spectroscopyAbsorption spectrum of a butterfly LWS opsin. Absorption spectra of purified PxRh3 WT (magenta). An estimated sensitivity curve of PxRh3 (grey curve) was obtained by fitting PxRh3 spectra with rhodopsin nomogram. Wavelength of maximum sensitivity of PxRh3 is estimated to 566 nm (grey arrowhead)Back to article page