Absorption Spectra of the Six Rhodopsins Expressed by the Fruit Fly Drosophila (after [8])

<p>Rh1 is the rhodopsin of the R1–R6 photoreceptors, Rh2 is expressed in the ocelli, Rh3 and Rh4 exist in two main classes of R7 photoreceptors, and Rh5 and Rh6 are the rhodopsins of the two corresponding classes of R8 photoreceptors. A specific, small set of R7 photoreceptors expresses both Rh3 and Rh4.