Figure 3. The venous-to-arterial fate change is gradual and culminates in an expression threshold.
(a) Coronary differentiation pathway (dashed arrow). (b–e) Gene expression along the differentiation pathway. Dotted lines, SVc expression levels; red shading, pre-artery cells. (f) Model based on known marker gene patterns. (g) Cell cycle genes decreased in pre-artery cells. CV, coronary vessel; SVc, sinus venosus-coronary progenitors.