In this article we will discuss about the gene action in bacteria. Tryptophan Biosynthesis in Salmonella: In Salmonella, tryptophan biosynthesis was studied by Brenner (1955). Tryptophan locus is mutable at four different sites. In other words, tryptophan synthesis consists of four biochemical steps. Reaction of each step is controlled by specific enzyme. Inactivation of an […]
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