A: The variant NC_000019.10:g.19516240T>C in gene NDUFA13 is classified as 'Uncertain_significance' for Mitochondrial_complex_1_deficiency,_nuclear_type_28. Molecular consequence: SO:0001582: initiator_codon_variant,SO:0001583: missense_variant. Variant type: single_nucleotide_variant. Disease database links: MONDO:MONDO:0032632,MedGen:C4748827,OMIM:618249. Review status: criteria provided, single submitter.