Abstract
A single genetic factor may affect the realization of several enzymes. To investigate the extent of pattern pleiotropy in the mouse, the activities of 28 enzymes in livers and brains from an inbred stock of C57BL/6J Nctr and five F1 stocks heterozygous for known electrophoretic variants were measured. Five congenic backcross stocks of C57BL/6J, each homozygous for one or more electrophoretic markers, were mated with C57BL/6J Nctr to construct the heterozygous variant F1 stocks. One of the five F1 stocks had no enzyme activities significantly different from those of C57BL/6J Nctr, while two had one enzyme, one had four enzymes, and another had six enzymes with activities that were significantly different from those of C57BL/6J Nctr. The latter two F1 stocks with multiple activity differences were those having the largest proportion of their genome of donor origin. Two of the F1 stocks were different from each other for one enzyme, and two were different for another enzyme. These differences and the relationship of these enzyme activities to the variant genes suggest that several genetic factors may affect an enzyme's realization.
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This work was supported by the National Center for Toxicological Research and by Contract EV-76-S-02-3267 with the Department of Energy, Grant GM-19656 from the National Institute of General Medical Sciences, and Contract ES-42159 with the National Institute of Environmental Health Sciences.
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Feuers, R.J., Bishop, J.B., McGarrity, L.J. et al. Pleiotropic and other genetic effects influencing the activities of brain and liver enzymes in congenic lines of C57BL/6J mice with defined electrophoretic variant markers. Biochem Genet 20, 1139–1149 (1982). https://doi.org/10.1007/BF00498938
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DOI: https://doi.org/10.1007/BF00498938