1887

Abstract

The uptake and retention of purine bases and of uracil requires both a protonmotive force and intracellular conversion to nucleotides. Inhibition of uptake by arsenate does not imply that ATP is required for the transport process because arsenate caused a rapid fall in the level of 5-phosphoribosyl 1-pyrophosphate. A mutation defective in high-affinity adenine transport has been identified and is designated . This mutation has been found to lie in the neighbourhood of . Competition experiments indicate that at least two other systems are used to transport guanine, xanthine and hypoxanthine.

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/content/journal/micro/10.1099/00221287-129-11-3505
1983-11-01
2021-07-30
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