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Purity of primary rat cortical neuron (RCN) cultures. (A) RCN cultures were fixed and stained with MAP2 (neuronal marker, red) and 4′,6-diamidino-2-phenylindole (DAPI; nuclear marker, blue) at 7 days in vitro. (B) Percent of MAP2-positive cells to total number of cells (DAPI; N = 9). MAP2, microtubule-associated protein 2. Color image is available online at www.liebertpub.com/neu
