LQT-associated mutants in the IAD
| Nucleotide | Amino acid | Mutation type | Region | Phenotype | Reference |
| G604C | D202H | Missense | S3 | Napolitano et al., 2005 | |
| G604A | D202N | Missense | S3 | RWS | Yamaguchi et al., 2003 |
| A610T | I204F | Missense | S3 | RWS | Tester et al., 2005 |
| C612G | I204M | Missense | S3 | Napolitano et al., 2005 | |
| C626T | S209F | Missense | S3 | Napolitano et al., 2005 | |
| G643A | V215M | Missense | S3 | Napolitano et al., 2005 |
| Nucleotide | Amino acid | Mutation type | Region | Phenotype | Reference |
| G604C | D202H | Missense | S3 | Napolitano et al., 2005 | |
| G604A | D202N | Missense | S3 | RWS | Yamaguchi et al., 2003 |
| A610T | I204F | Missense | S3 | RWS | Tester et al., 2005 |
| C612G | I204M | Missense | S3 | Napolitano et al., 2005 | |
| C626T | S209F | Missense | S3 | Napolitano et al., 2005 | |
| G643A | V215M | Missense | S3 | Napolitano et al., 2005 |
Amino acid numbering is based on Gene Bank cDNA:AF000571 and nucleotide numbering starts from ATG. RWS, Romano-Ward syndrome.