text: Well-validated naturally occurring ribozyme classes:
  * GIR1 branching ribozyme
  * glmS ribozyme
  * Group I self-splicing intron
  * Group II self-splicing intron – Spliceosome is likely derived from Group II self-splicing ribozymes.
  * Hairpin ribozyme
  * Hammerhead ribozyme
  * HDV ribozyme
  * rRNA – Found in all living cells and links amino acids to form proteins.
  * RNase P
  * Twister ribozyme
  * Twister sister ribozyme
  * VS ribozyme
  * Pistol ribozyme
  * Hatchet ribozyme
  * Viroids