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  • Title: Branched-chain amino acid transport in Streptococcus agalactiae.
    Author: Moran JW.
    Journal: Appl Environ Microbiol; 1980 Jul; 40(1):25-31. PubMed ID: 6447476.
    Abstract:
    The transport of the branched-chain amino acids in Streptococcus agalactiae was characterized. Glucose-grown cells were able to utilize only glucose as an energy source for transport of L-leucine, whereas lactose-grown cells could utilize both glucose and lactose. It was determined from metabolic inhibitor studies that energy from glycolysis and substrate level phosphorylation was required for active transport. Energy was found to be coupled to transport by the action of adenosine triphosphatase and the generation of a proton motive force. The branched-chain amino acids were found to share a common transport system that may consist of multiple components.
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