Summary: , which can use lysine as a carbon and energy source, has two active transport systems for lysine – a high affinity system, inhibited by arginine and ornithine, and a low affinity system. Lysine-grown organisms had a higher transport activity than succinate-grown organisms but this higher activity was probably not the result of induction by lysine. , a species unable to degrade lysine, has a single high affinity active transport system specific for lysine; this transport system has a physiological role in the maintenance of the internal concentration of free lysine.


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