J. I. Harris

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The glyceraldehyde 3-phosphate dehydogenase holoenzyme of Bacillus stearothermophilus possesses precise 222 symmetry: in this respect it differs from the reported structure of the lobster muscle enzyme. Pairs of active sites are linked through a flexible polypeptide loop which probably mediates the structural changes giving rise to cooperative effects.(More)
1. The complete amino acid sequence of D-glyceraldehyde-3-phosphate dehydrogenase from the moderate thermophile Bacillus stearothermophilus has been determined. 2. This has been achieved largely by the automated sequence analysis of large fragements derived by chemical cleavage with cyanogen bromide, BNPS-skatole [the product of reaction between(More)
Superoxide dismutase has been isolated and characterised from the extreme thermophile Thermus aquaticus. The pure enzyme is a reddish-purple manganese-containing protein with a molecular weight of approximately 80000 +/- 5000. Combination of gel electrophoresis in dodecylsulphate and amino acid analysis shows that it is composed of four identical subunit(More)
In previous reports (I, 2), data were presented on the growth response of a leucineless mutant (strain 679-680)’ of Escherichia coli strain K-12 to various L-leucine peptides. Measurement of the extent of bacterial growth after 24 hours incubation showed that, at low concentrations, the peptides were almost as effective in the stimulation of growth as was(More)
The amino-terminal sequences of superoxide dismutase isolated from seven microorganisms have been determined. These include the first sequences of enzyme from anaerobic phototrophes. Five enzymes contain iron and two manganese. The enzymes are all related to each other but not to the Cu/Zn family of superoxide dismutases. These sequences, taken with six(More)