From SELEX to cell dual selections for synthetic riboswitches.

Synthetic riboswitches have emerged as useful tools for controlling gene expression to reprogram cellular behavior. However, advancing beyond proof-of-principle experiments requires the ability to quickly generate new synthetic riboswitches from RNA libraries. In this chapter, we provide a step-by-step overview of the process of obtaining synthetic riboswitches for use in Escherichia coli, starting from a randomized RNA library.