Fig. 5.

T-box gene expression during heart development. T-box genes are expressed in complex, overlapping patterns throughout heart development. The E8.25 heart is shown in a left lateral view of the whole embryo and in a frontal view of the isolated heart and second heart field. Hearts at later stages are shown as schematic transverse sections. Color coding indicates expression of individual genes or combinations of genes in different regions. AVC, atrioventricular canal; IFT, inflow tract; IVS, interventricular septum; LA, left atrium; LSH, left sinus horn; LV, left ventricle; OFT, outflow tract; RSH, right sinus horn; RV, right ventricle; V, ventricle; VV, venous valves. Reprinted from Greulich et al. (2011) with permission.