A: The variant NC_000021.9:g.31667307G>A in gene SOD1 is classified as 'Uncertain_significance' for Amyotrophic_lateral_sclerosis_1,_autosomal_recessive|not_provided. Molecular consequence: SO:0001583: missense_variant. Variant type: single_nucleotide_variant. Disease database links: MedGen:C5686324|MedGen:C3661900. Review status: criteria provided, single submitter.