A previous study proposed that a 3.7 Mb genomic region of Mmu16 (Ifnar1 – Kcnj6) in Dp(16)4Yey was sufficient to cause CHD (Liu et al., 2013); this region overlaps the centromeric end of the duplicated region of Dp3Tyb by 1.9 Mb from Mir802 to Kcnj6, which may help to further narrow down the search for causative genes (Figure 6b). This evidence concerns the gene MIR802 and coronary artery disorder.