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. 1974 Sep;119(3):976–985. doi: 10.1128/jb.119.3.976-985.1974

Altered Proteins with Triosephosphate Isomerase Activity in Suppressor-containing Strains of Bacillus subtilis

James N Baptist a, M J Tevethia a,1, Manley Mandel a, Charles R Shaw a
PMCID: PMC245705  PMID: 4211788

Abstract

Suppressor mutations in Bacillus subtilis cause the synthesis of a new protein with the enzymatic activity of l-leucine dehydrogenase and two groups of new proteins with the activity of triosephosphate isomerase. The new isoenzymes of triosephosphate isomerase are separable by zone electrophoresis and differ among themselves in elution behavior upon gel permeation chromatography. One group has an apparent average molecular weight of 120,000 to 135,000, which is more than twice that of the wild-type enzyme. Another group appears to be even higher in molecular weight. These data are consistent with the working hypothesis that the new isoenzymes are produced by extension of growing polypeptide chains through one or more chain-terminating triplets, although other mechanisms resulting in alteration of shapes, charges, or associations of the enzymes are not excluded.

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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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