ENU-induced A to T transversion at base pair 125,312,770 on chromosome 6, corresponding to base pair 1,101 in GenBank genomic region NC_000072 encoding Ltbr. The mutation corresponds to residue 660 in the mRNA sequence NM_010736 within exon 4 of 10 total exons. The mutation results in a threonine to serine substitution at position 154 (T154S) in the LTR protein. (J:264642)