Fig. 3.

Alignment of human and mouse melanopsin-deduced amino acid sequences. Sequences were aligned with ClustalW 1.6 (Thompson et al., 1994). Predicted transmembrane domains areboxed and were determined by homology toXenopus melanopsin (Provencio et al., 1998b). The Schiff's base lysine (▪) and the invertebrate-like tyrosine counterion (●) are indicated.