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.
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. 
