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An effective protein expression system was constructed in Escherichia coli using the promoter of the tyrosine phenol-lyase (tpl) gene of Erwinia herbicola. This system involves a mutant form of the TyrR protein with an enhanced ability to activate tpl and the TutB protein with an ability to transport L-tyrosine (an inducer of Tpl). The highest expression level obtained for this system was more than...
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