Rj. Harris et D. Elder, Ribozyme relationships: The hammerhead, hepatitis delta, and hairpin ribozymes have a common origin, J MOL EVOL, 51(2), 2000, pp. 182-184
The hammerhead and the hairpin ribozymes of plant viroids/virusoids and the
hepatitis delta ribozyme were generally considered to be unrelated to one
another. Here we report notable sequence interrelationships and some struct
ural ones connecting all three.