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J Bacteriol. 1961 October; 82(4): 551-555
Copyright ©, 1961, The Williams & Wilkins Company. All Rights Reserved.

ROLE OF POTASSIUM IN THE OXIDATIVE METABOLISM OF MICROCOCCUS SODONENSIS¹

^a Division of Bacteriology, American Meat Institute Foundation, The University of Chicago, Chicago, Illinois

ABSTRACT

PERRY, JEROME J. (The University of Chicago, Chicago, Ill.), AND JAMES B. EVANS. Role of potassium in the oxidative metabolism of Micrococcus sodonensis. J. Bacteriol. 82:551–555. 1961.—An absolute potassium requirement has been established for the growth of Micrococcus sodonensis with lactate or pyruvate as substrate. Potassium at 0.67 x 10^–2M concentration was necessary for maximal growth. Resting cell and cell-free preparations from cells grown on minimal levels of potassium were stimulated by potassium but, due to residual or bound cation, did not show an absolute requirement. Rubidium and cesium replaced potassium in these cells although cesium is much less effective.

² Present address: Dept. of Bacteriology, Univ. of Texas, Austin 12, Texas

³ Present address: Department of Botany and Bacteriology, North Carolina State College, Raleigh, N. C.

¹ Journal paper no. 213, American Meat Institute Foundation. This investigation was supported in part by a research grant (E-1951) from the National Institute of Allergy and Infectious Diseases, U. S. Public Health Service.