"We report two Tunisian patients belonging to a consanguineous family with mitochondrial encephalomyopathy. Mutational analysis of SUCLG1 gene showed the presence of c.41T > C in exon 1 in a homozygous state. This mutation substitutes a conserved methionine residue to a threonine at position 14 (p.M14T) located at the SUCLG1 protein mitochondrial targeting sequence."xsd:string