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Molecular assay reagents intended to identify mutations in the NADH dehydrogenase 4 (MTND4) gene, located in the mitochondria, which encodes for NADH dehydrogenase subunit 4 protein that is complex 1, part of a large enzyme complex active in mitochondria. Mutations at this locus have been identified in patients with Leber\'s hereditary optic neuropathy (LHON).
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