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Progressive induction of β-glucuronidase in individual kidney epithelial cells

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Abstract

The magnitude and kinetics of β-glucuronidase induction in mouse kidney are determined by a cis-acting regulatory gene, Gus-r, that is closely linked to the enzyme structural gene. The accumulation of β-glucuronidase mRNA during induction is much slower than the turnover time of the mRNA, suggesting progressive acquisition of mRNA synthesizing capacity during induction. Counts of the numbers of induced cells present at various times of induction in strains carrying three different alleles of Gus-r show that all potentially responsive cells respond immediately. The level of induction is progressive in individual cells and does not involve continued recruitment of new cells into the induced population. It appears that during induction each chromosome becomes progressively more active in directing the synthesis of β-glucuronidase.

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This work was supported in part by USPHS Grant GM 19521. Audrey F. Jakubowski was a postdoctoral trainee on USPHS Training Grant GM07093.

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Paigen, K., Jakubowski, A.F. Progressive induction of β-glucuronidase in individual kidney epithelial cells. Biochem Genet 20, 875–881 (1982). https://doi.org/10.1007/BF00484065

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  • DOI: https://doi.org/10.1007/BF00484065

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