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. 1988 Jun 15;252(3):897–900. doi: 10.1042/bj2520897

Studies on the genetic linkage of bilirubin and androsterone UDP-glucuronyltransferases by cross-breeding of two mutant rat strains.

F Nagai 1, H Homma 1, H Tanase 1, M Matsui 1
PMCID: PMC1149232  PMID: 3138978

Abstract

Gunn rats, which have defects in bilirubin and 4-nitrophenol UDP-glucuronyltransferases (GT), were crossed with LA Wistar rats with a defect in androsterone GT. The F1 hybrids showed normal GT activities towards androsterone, bilirubin and 4-nitrophenol, demonstrating that Gunn and LA ('low activity') Wistar rats inherit a homozygous dominant trait for androsterone GT and bilirubin GT respectively. The F2 progeny showed four different combinations of bilirubin and androsterone GT activities: defects in both GT activities, a single defect in bilirubin GT activity, a single defect in androsterone GT activity and two normal GT activities. They were segregated in the approximate ratio of 1:3:3:9, which is compatible with Mendel's Principle of Independent Assortment. These results provide evidence that androsterone GT and bilirubin GT are located on different chromosomes. In the F2 generation, defective bilirubin and 4-nitrophenol GT activities were not segregated, indicating that these two mutant genes are closely linked on the same chromosome.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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