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Extracardiac expression of PEX1 in embryonic development. Immunohistochemical staining of tissue sections with the anti-PEX1 antibody revealed PEX1 presence in embryonic gut (stomach and intestine), spinal cord, and postnatal lung. The arrow and arrowhead in the lung panel indicate PEX1-positive smooth muscle and epithelial cells, respectively. The arrow and arrowhead in the kidney panel indicate PEX1 positive tubular and S-shaped body cells, respectively.
