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A: Sketch showing the proposed genetic relationship among bHLH genes in chick retinal neurogenesis. B: Diagram of gene-directed reprogramming of RPE showing genes that have been assayed and the cell types that the major products mostly closely resemble. Parentheses indicate that the cell type constitutes a minor component of the resultant reprogramming products. All, all other types of retinal cells.
Am: Amacrine cells; Gc: Retinal ganglion cells; Pr: Photoreceptors.
