%0 Journal Article %A C Montell %A K Jones %A C Zuker %A G Rubin %T A second opsin gene expressed in the ultraviolet-sensitive R7 photoreceptor cells of Drosophila melanogaster %D 1987 %R 10.1523/JNEUROSCI.07-05-01558.1987 %J The Journal of Neuroscience %P 1558-1566 %V 7 %N 5 %X We have identified a second Drosophila opsin gene, Rh4, which is expressed specifically in the ultraviolet-sensitive R7 photoreceptor cells. The two R7 opsins, Rh3 and Rh4, are expressed in nonoverlapping subsets of R7 cells. The Rh4 opsin shares 72% amino acid identity with Rh3, but is only about 35% homologous with the other 2 Drosophila opsins, ninaE and Rh2. Twenty-eight amino acids are conserved among all 4 invertebrate and 5 vertebrate opsin genes thus far sequenced, suggesting that these residues play an important role in rhodopsin function. %U https://www.jneurosci.org/content/jneuro/7/5/1558.full.pdf