ENU-induced T to C transition at base pair 83,955,911 (v38) on chromosome 8, or base pair 218 in the GenBank genomic region NC_000074 encoding Asf1b. The mutation corresponds to residue 218 in the mRNA sequence NM_024184 within exon 1 of 4 total exons. The mutated nucleotide is indicated in red. The mutation results in a phenylalanine to serine substitution at position 28 (F28S) in the ASF1B protein. (J:267479)