Table 1.

Amino acid comparison of melanopsin to the other opsins

Opsin/family*	% identity
M2	31
Rh	30
M1	29
S	30
P	30
L	31
VA	30
Cephalopod	39
Insect	32
Retinochrome	25
RGR	30
Peropsin	32
Chlamyopsin	18

Data are from pairwise alignments of amino acid sequences contained within the predicted first through seventh transmembrane domains.

^*Representatives of opsin families are described in Fig. 2C.