Fig. 4. Disrupted cardiac pre-pattern and Tbx2 expression in
Tbx20lacZ/lacZ embryos. (A-M) Whole-mount in-situ
hybridization analysis of wild-type (wt), Tbx20lacZ/lacZ,
Nkx2-5GFP/GFP or compound
Tbx20lacZ/lacZ/Nkx2-5GFP/GFP embryos using
indicated probes. Panel C shows sections of whole-mount embryos at the level
of the sinuatrium. sa, sinuatrium.