Figure 2From: Functional characterization of spectral tuning mechanisms in the great bowerbird short-wavelength sensitive visual pigment (SWS1), and the origins of UV/violet vision in passerines and parrotsUV-visible dark absorption spectra of C. nuchalis SWS1 mutants. Dark spectra of (A) S90C, (B) C86F, (C) C86S, and (D) double mutant C86S/S90C, all recorded at pH 6.6. Insets show dark-minus-acid difference spectra. Estimated λmax values indicated for each mutant.Back to article page