Figure 3
From: Subepicardial endothelial cells invade the embryonic ventricle wall to form coronary arteries

Apln expression map at E9.5 to E12.5. (A-D) Apln is expressed in PECAM+ vascular ECs, but not in endocardial ECs. Asterisks indicate AV groove; red arrow indicates Apln+PECAM+ vascular ECs. PA, pharyngeal arch; Li, liver; h, heart; PEO, proepicardial organ. Representative of three hearts for each time point. White bar = 100 μm.