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. Author manuscript; available in PMC: 2012 Oct 24.
Published in final edited form as: J Mol Biol. 2011 Apr 27;409(5):786–799. doi: 10.1016/j.jmb.2011.04.039

Table 2.

Effect of SMK box riboswitch mutagenesis on the expression of E. faecalis metK-lacZ reporter gene expression in vivo.

−Met +Met Induction ratiob
WT 130a 29 4.5
G77U 8.5 0.28 30
G77C 250 90 2.8
A87C 0.075 0.53 0.14
a

β-Galactosidase activities are expressed in Miller units 40.

b

Ratio of expression during growth in the absence of methionine to expression during growth in the presence of methionine.