Abstract
The spore and vegetative cell adenylate kinases of Bacillus subtilis, purified about 1,000-fold, proved indistinguishable by several physical and functional tests, including polyacrylamide gel electrophoresis, DEAE cellulose chromatography, and specificity toward substrates. Adenylate kinase activity in cell extracts, followed throughout growth and sporulation, was found to reach a maximum near the end of exponential growth, remain at that level during sporulation, until shortly before the appearance of refractile forms, and then decline, along with total protein, during the subsequent maturation of the spores. The enzyme, stable in extracts of exponential growing cells, was unstable in extracts of sporulating cells, presumably as a result of degradation by protease(s) appearing after the end of exponential growth.
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Selected References
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