Shelby is an assistant editor for The Scientist. She earned her PhD from West Virginia University in immunology and microbiology and completed an AAAS Mass Media fellowship.

In the case of the trp operon, the ligand tryptophan is required for the repressor to work (repressible negative regulation). But other operons respond to the presence of their small molecule ...

In particular, the 'polycistronic operon' system, where multiple genes ... Synthetic RNA-based translation regulatory parts often encountered limitations in regulating multiple genes and achieving ...