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Morphology of M17 cells without and with RA differentiation. M17 neuroblastoma cells were grown on cover slips and treated with or without 10 μM RA for 72 hours to induce differentiation. Cells were fixed, stained, and light microscopy images were taken. (A) Undifferentiated cells, (B) Differentiated cells. 40X magnification; Scale bar is approximate.
