Summary
The existence of phosphoribomutase and 5-phosphoriboisomerase has been demonstrated in isolated cellular nuclei from rat liver and swine kidney. Phosphoribomutase has been shown to require Mg-ions for optimal activity.
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Lang, K., Hartmann, K.U. Phosphoribomutase- und 5-Phosphoriboisomerase-Aktivität in isolierten Zellkernen. Experientia 14, 130–131 (1958). https://doi.org/10.1007/BF02157113
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DOI: https://doi.org/10.1007/BF02157113