ENU-induced G to A transition at base pair 17,281,044 (v38) on chromosome 16, or base pair 125,271 in the GenBank genomic region NC_000082 encoding Pi4ka. The mutation corresponds to residue 6,053 in the mRNA sequence NM_001001983 within exon 53 of 55 total exons. The mutation results in an arginine (R) to histidine (H) substitution at position 1,992 (R1992H) in the PI4KA protein.