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. 1980 May 15;188(2):573–576. doi: 10.1042/bj1880573

Ribonucleotide reductase activity in vitamin B12-deficient Euglena gracilis.

E F Carell, J W Seeger Jr
PMCID: PMC1161906  PMID: 6772171

Abstract

The ribonucleotide reductase activities in vitamin B12-sufficient and -deficient cells of Euglena gracilis were measured. We found that the cells progress into vitamin B12 deficiency the enzyme activity increases, reaching a maximum value of 20-fold in advanced deficiency. No signigicant differences in the activities were found to result as a consequence of different growth conditions. We propose that the increased activity in vitamin B12-deficient cells is due to an increase in enzyme protein.

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Selected References

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