Tryptophan-grown cells of Bacillus megaterium ATCC 19213 contain a permease system that transports both D- and L-tryptophan and is inhibited by sodium azide. Arginine-grown cells contain little tryptophan permease activity, suggesting that the system is inducible. Arginine represses the tryptophan permease as well as the transport system for leucine and phenylalanine. Kynurenine was a more effective inducer of the tryptophan transport system than either D- or L-tryptophan.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC285613 | PMC |
| http://dx.doi.org/10.1128/jb.121.1.65-69.1975 | DOI Listing |
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