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Interactions of IPs with other cell types. (A) IPs express Dll1 on their processes, and activate Notch (N) receptors on RG cells (enlarged in inset). (B) IPs secrete Cxcl12, which guides interneurons (INs) and microglia (Mic) to migrate through the SVZ, and stimulates the growth of thalamocortical axons (TCA).
