The induction of dominant somatic mutations at the Dlb-1 locus.

Abstract excerpt

In the small intestine of heterozygous mice (Dlb-1b/Dlb-1a), the Dlb-1b allele results in a stainable epithelium. The mutation or loss of the dominant Dlb-1b allele in a stem cell results in a non-staining ribbon of cells on a villus of the small intestine. To determine if dominant mutations resulting in the gain of staining--the induction of a Dlb-1b-like allele--could also be detected, we examined Dlb-1a...

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