Specific examples of these conditions include mutations in the SLC2A1 gene, which encodes the glucose transporter GLUT1, as well as metabolic disorders such as mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) and myoclonic epilepsy with ragged red fibers (MERRF) syndromes. The gene discussed is SLC2A1; the disease is MERRF.