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Phenotype of primary pulmonary arterial endothelial cells. Characterization of pulmonary arterial cells ascertained by morphologic and immunohistochemistry analyses of endothelial markers (CD31, von Willebrand factor). (A) Immunofluorescence for von Willebrand factor (green) and (B) CD31 (brown) by immunohistochemistry. Representative image is from PAH cells. Hence, control pulmonary arterial endothelial cells have the same phenotype.
