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Representative immunohistochemistry of NPY-Y1 receptors (red) and YFP-H-positive upper motor neurons (green) obtained from a YFP-H mouse at 20 weeks of age. White boxes indicate regions selected for quantitative analysis of NPY-Y1 receptor expression on YFP-H upper motor neurons. Nissl stain was also utilized for lamina localization. Scale bar = 200 µm.
