Fig. 2
From: Visual adaptation of opsin genes to the aquatic environment in sea snakes
Absorption spectra of RH1 and LWS pigments evaluated by darkâlight difference spectra. RH1 pigments were constructed from a S. japonicus boettgeri, b L. semifasciata, c E. ijimae, and d H. ornatus. LWS pigments were constructed from e H. ornatus. The absorption from mutants of RH1 pigments are shown in f A292 and 292P, and g 181H and 181N