A: The variant NC_000019.10:g.35033550G>C in gene SCN1B is classified as 'Uncertain_significance' for not_provided|Conduction_system_disorder|Developmental_and_epileptic_encephalopathy,_52. Molecular consequence: SO:0001583: missense_variant. Variant type: single_nucleotide_variant. Disease database links: MedGen:C3661900|EFO:EFO_0005137,MONDO:MONDO:0005449,MedGen:C2748542|MONDO:MONDO:0033361,MedGen:C4479236,OMIM:617350. Review status: criteria provided, multiple submitters, no conflicts.