A Novel Zebrafish Gene Expressed Specifically in the Photoreceptor Cells of the Retina |
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Institution: | 1. Biophysics Program, Harvard University, Cambridge, Massachusetts, 02138;2. Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts, 02138 |
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Abstract: | We have identified and characterized a novel protein from adult zebrafish retina, which we named ES1. Database search revealed that the ES1 gene has significant similarity to two genes with unknown functions: theEscherichia colisigma cross-reacting protein 27a (scrp27a) and the human KNP-I/GT335.In situhybridization and immunohistochemistry experiments showed that both ES1 mRNA and protein are expressed specifically in adult photoreceptor cells. ES1 seems to be a cytoplasmic protein. An ES1-like antigen was also detected in photoreceptor cells of goldfish with anti-ES1 antibodies. The retina specific expression and the evolutionary conservation suggest that ES1 protein may be important for maintaining normal retina structure and function. |
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