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. Author manuscript; available in PMC: 2021 Mar 9.
Published in final edited form as: Cell Rep. 2020 Feb 25;30(8):2472–2480.e4. doi: 10.1016/j.celrep.2020.02.004

Figure 1.

Figure 1.

Evaluating the impact of the cellular environment on conformational equilibria using targeted stabilization of RNA ESs and functional readouts to measure the population of the active RNA GS. Substitution mutations (star) redistribute the WT RNA ensemble in vitro, increasing the abundance of an ES over the GS to various degrees measured by NMR spectroscopy. The impact of the mutations on cellular activity is then measured using an appropriate assay.