Maturation and degradation of RNA in bacteria.

RNA decay plays an important role, not only in recycling nucleotides but also in determining the rapidity with which cells can react to changing growth conditions. The degradation process can be regulated, thus providing an often-underestimated means of controlling gene expression. Recent developments in the field of RNA maturation and decay in two key model organisms, Escherichia coli and Bacillus subtilis, include the resolution of the structures of many of the participants in these processes in E. coli and the identification of an enzyme in B. subtilis that appears to fit the bill as a major player in RNA decay in this organism.

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