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Agrin and laminin are confined to the perivascular basal lamina. Immunogold labeling confirms localization of agrin (a–d) and laminin (e–h) to the perivascular basal lamina (arrows). Both proteins are present throughout the postnatal period. Electron micrographs of postnatal mouse neocortex. E endothelial cells, L vessel lumen, asterisk tight junction. Scale bar 0.5 μm
