... consists of ∼800 ommatidia. Every ommatidium contains eight PR cells, six outer cells (R1-R6) and two inner cells (R7 and R8), by which object detection and color vision are achieved, respectively. Expression of opsin genes in R7 and R8 is highly coordinated through the instructive signal from R7 to R8...

.... , Baxter L. C. , Chun L. L. , Falk J. D. , Farhangfar F. , Kage K. , Krzystolik M. G. , Lyass L. A. , Robbins J. T. ( 2000 ). The murine cone photoreceptor: a single cone type expresses both S and M opsins with retinal spatial patterning . Neuron 27 , 513 - 523...

[email protected] ) 11 9 2007 © 2007. 2007 Prox1 Gfi1 Otx2 Opsin Cell-specific gene expression Photoreceptor cell Drosophila photoreceptor cells (PRs) constitute a unique system for studying how neuronal diversity is achieved during sensory system development. The fly compound eye...

... contained in the divergent sequence C-terminal to the homeodomain,while the more homologous N-terminal and homeodomain regions of both genes,when fused to VP16 activators, promote only photoreceptor fates. XOtx5b is closely related to Crx and like Crx it drives expression from an opsin reporter in vivo...

...Wen-Hai Chou; Armin Huber; Joachim Bentrop; Simone Schulz; Karin Schwab; Linda V. Chadwell; Reinhard Paulsen; Steven G. Britt Opsin gene expression in the R7 and R8 photoreceptor cells of the Drosophila compound eye is highly coordinated. We have found that the R8 cell specific Rh5 and Rh6 opsins...