Effects of guanosine tetraphosphate, guanosine pentaphosphate, and beta-gamma methylenyl-guanosine pentaphosphate on gene expression of Escherichia coli in vitro.

Effects of guanosine tetraphosphate, guanosine pentaphosphate, and beta-gamma methylenyl-guanosine pentaphosphate on gene expression of Escherichia coli in vitro.