This protocol is used for RNA extraction in cyanobacteria after Pinto et al. 2009.Pinto, Fernando Lopes; Thapper, Anders; Sontheim, Wolfgang; Lindblad, Peter (2009): Analysis of current and alternative phenol based RNA extraction methodologies for cyanobacteria. In: BMC molecular biology 10, S. 79. DOI: 10.1186/1471-2199-10-79 .