New rods move before differentiating in adult teleost retina

Neuronal differentiation of the vertebrate retina can be analyzed through the following experiment. The progenitor cells in teleost retina are located adjacent to the outer retinal membrane and divide near the scleral border after which they move inwards toward the vitreal boundary of the outer nuclear membrane. The differentiation of these progenitor cells into rod photoreceptors takes place after this movement which is seen even in adult retinae. The results of the study suggest that only one of the progenitor daughter cells moves inward while the other remains in its original position and re-divides.