A previously unknown mechanism enables bacterial antibiotic resistance -- ScienceDaily
https://www.sciencedaily.com/releases/2020/02/200203114337.htm
The sleeping Sigma-Factor | Max-Planck-Gesellschaft
https://www.mpg.de/14404619/0131-terr-138345-the-sleeping-sigma-factor
Transcriptional regulation by σ factor phosphorylation in bacteria | Nature Microbiology
https://www.nature.com/articles/s41564-019-0648-6