DMD mutation types
Several different mutation types can prevent the creation of a full-length, functional dystrophin protein Footnotes Footnotes Footnotes 1–3
nmDMD is caused by a point mutation leading to the presence of a premature stop codon in the DMD gene, which results in the creation of a truncated form of dystrophin Footnote 4
![Normal translation of dystrophin](../../assets/diagram-mutation-types-a.b4f12139.png)
![Incomplete translation of dystrophin](../../assets/diagram-mutation-types-b.719b7951.png)
The presence of a nonsense mutation in the dystrophin gene should be determined by genetic testing Footnote 4