SLC25A42 and Mitochondrial myopathy: A single nucleotide mutation in SLC25A42 (causing the substitution p.Asn291Asp in its protein product) was found in 14 homozygous individuals of Arabic descent, who presented variable degrees of severity of symptoms such as mitochondrial myopathy with muscle weakness, lactic acidosis, encephalopathy, developmental regression, and epilepsy [170,171,172].