Table 1. The incidence of atrial septal defects (ASD) as a function of Nipbl genotype in the heart.

Conditional haploinsufficiency experiments (Flox/+ x Cre)
Nipbl genotype in cardiomyocyte (cTnt) lineage	Nipbl genotype in Sox17 lineage	Frequent ASDs?
+/+	+/+	no
+/-	+/+	yes
+/+	+/-	yes
Conditional rescue experiments (FLEX/+ x Cre)
Nipbl genotype in cardiomyocyte (cTnt) lineage	Nipbl genotype in Sox17 lineage	Frequent ASDs?
+/+	+/+	no
+/-	+/+	no
+/+	+/-	no