Fig. 3. AV cushion apoptosis is decreased in Hhex^–/– mice. ECC apoptosis is decreased by 75% in the absence of Hhex (representative panels shown in A and B) while proliferation is unchanged (representative panels shown in C and D). Composite data are shown in the graphs on the far right (n=3 animals for each genotype). Bars show means+s.e.m. n=3 for each phenotype. ECC, endocardial cushion cells; Atr, atrium.