Supplementary File 1. RNAMotif Rnamotif / DARN! search patterns for the new permutations of the hammerhead ribozyme and analogous twister ribozyme permutations. Supplementary File 2. Alignments of novel RNA motifs detected in this work (Supplementary Table 2). The alignments are stored in Stockholm format, which is a text format that can be viewed with a fixed-width font and can also be interpreted by several computer programs. Only unique sequences are supplied. Supplementary File 3. Printable alignments of novel RNA motifs detected in this work (Supplementary Table 2), in PDF format. Only unique sequences are shown. Supplementary File 4. Frequencies of RNA motifs in different environmental datasets. This data is a basis for relevant columns in Supplementary Table 2. The first worksheet describes the data format.