Cover Picture: A coronal section of the mouse presubicular cortex at postnatal day 3 is simultaneously stained red with propidium iodide and green with CR-50, a monoclonal antibody to reelin. Vertical columns composed of cortical plate neurons (red) are present in the supragranular layer. In the marginal zone, clusters of Cajal-Retzius cells (green) form well-delineated territories with a specific topography and CR-50 labeling shows a periodic modulation in the horizontal dimension. Late-born cortical neurons seem to take up horizontal positions in the supragranular layer, avoiding the reelin-rich zone that results from the strategic location of Cajal-Retzius cells in the marginal zone. See Nishikawa et al. , pp. 1024-1030.
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