| Mutation type*1 | Mutation position | Length of affected nucleotides | Nucleotide sequence after mutation | Mutation name | Case # | Consequence | Disease | Symptom | Hereditary pattern*2 | Reference |
| M | 533 | 1 | T | T178M | 2 | ACG-ATG --> Thr-Met at codon 178 | congenital heart disease, non syndromic | atrial septal defect associated with atrioventricular conduction defects | AD | Schott, J. et al. (1998) Science 281, 108. |
| N | 508 | 1 | T | Q170X | 1 | CAG-TAG --> Gln-Stop at codon 170 | congenital heart disease, non syndromic | atrial septal defect associated with atrioventricular conduction defects | AD | Schott, J. et al. (1998) Science 281, 108. |
| N | 592 | 1 | T | Q198X | 1 | CAG-TAG --> Gln-Stop at codon 198 | congenital heart disease, non syndromic | atrial septal defect associated with atrioventricular conduction defects | AD | Schott, J. et al. (1998) Science 281, 108. |



