Summary of sites of Transcript Expression Detected by in situ Hybridization

Sites of expression are tabulated for each of 31 candidates evaluated at each of 3 embryonic stages during cardiogenesis. HT, heart tube; H, heart; OFT, out flow tract; IFT, inflow tract; CA, common atria; RV, right ventricle; CNS, central nervous system; BA, branchial arches; S, somites; OV otic vesicle; SC, spinal cord; G, gut; DRG, dorsal root ganglia; E7.5�C9.5; embryonic days 7.5�C9.5;?indicates expression of transcript was detected in many other structures throughout the embryo. No signal means that expression was not detected at that time point.