Are the HPAEC harvested directly from the pulmonary artery or are these microvascular endothelial cells?

Our HPAEC (C-12241) are harvested directly from the pulmonary artery. For their isolation; the vessel is explanted right after the position where the artery leaves the heart; including the bifurcation. HPAEC represent the innermost cell layer (i.e. the endothelial cells) of the pulmonary artery. We also supply pulmonary microvascular endothelial cells (HPMEC; C-12281) isolated from the capillaries of peripheral lung tissue.