ID2 and ventricular septal defect 1: ID2 (located in 2p25.1), one of the genes known to participate in cardiac development, was found inside the CNV region of a patient suffering from atrial and ventricular septal defects, pulmonary atresia, and transposition of the great arteries (14,838 kb duplication in 2p24.3-p25.3), which indicates the likely association of ID2 gene defects in human CHD [91].