G to A transition at base pair 46,307,441 (v38) on chromosome 19, or base pair 3,122 in the GenBank genomic region NC_000085. The mutation corresponds to residue 782 in the mRNA sequence NM_019408 (variant 1) within exon 6 of 22 total exons. The mutation results in an arginine to histidine substitution at position 158 (R158H) in all isoforms of the NF-B2 protein.