Claim: Pfl RNA motif is a cis-regulatory element found in some bacteria such as species of orders Actinomycetales and Clostridiales, the classes Alphaproteobacteria and Betaproteobacteria and the genus Deinococcus.
Evidence: The pfl RNA motif (now called the ZMP/ZTP riboswitch) refers to a conserved RNA structure present in some bacteria and originally discovered using bioinformatics. This arrangement in bacteria is commonly associated with cis-regulatory elements. pfl RNAs are common among species of orders Actinomycetales and Clostridiales, the classes Alphaproteobacteria and Betaproteobacteria and the genus Deinococcus.