Choose one of the bacteria from the following list and explain how the Riboswitch impacts the harmful bacterial

Choose one of the bacteria from the following list and explain how the Riboswitch impacts the harmful bacterial:
Bacillus anthracis, Hemophilius influenza, Helicobacter pylori, Salmonella enterica, Streptococcus pneumonia.
I chose helicobacter pylori, and please I need the reference with the APA forma