Abstract
Background: Rods and cones are critical for light detection. Although there has been considerable work done in elucidating the molecular mechanisms involved in rod development, not much is known about how the cone cell fate decision is made by the multipotent retinal progenitor cells during development. Analysis of the promoter regions of Nrl and trβ2, rod and cone differentiation factors respectively, revealed DNA binding motifs of two POU-domain containing transcription factors, Pou2f1 and Pou2f2. Preliminary experiments showed that Pou2f1/2 are expressed during the peak of cone genesis in the embryonic retina. Therefore, we hypothesize that Pou2f1/2 specify cone cell fate in the developing retina.
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