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J Bacteriol. 1962 May; 83(5): 1005-1009
Copyright © 1962, The Williams & Wilkins Company. All Rights Reserved.

CITRATE TRANSPORT SYSTEM OF STREPTOCOCCUS DIACETILACTIS

Department of Food Science and Technology, University of California, Davis, California

ABSTRACT

HARVEY, R. J. (University of California, Davis) AND E. B. COLLINS. Citrate transport system of Streptococcus diacetilactis. J. Bacteriol. 83:1005–1009. 1962.—The uptake of citrate by Streptococcus diacetilactis is mediated by a transport system that was distinguished from passive diffusion by inducibility and kinetics of uptake. In these characteristics the system is similar to the ß-galactoside permease of Escherichia coli. The citrate transport system of S. diacetilactis differs from ß-galactoside permease by requiring metabolic energy for operation under conditions that do not permit intracellular accumulation of the substance transported.