(c-di-AMP), and glucosamine-6-phosphate (GlcN6P). Three putative cobalamin riboswitches were upstream of operons for cobalamin transport and biosynthesis, ribonucleotide-diphosphate reductase NrdAB and a B12-independent methionine synthase (Table4). Putative FMN riboswitches are located in front of...