Hammerhead Ribozyme

Hammerhead Ribozyme.

"The hammerhead ribozyme is a RNA molecule motif that catalyzes reversible cleavage and joining reactions at a specific site within an RNA molecule. It serves as a model system for research on the structure and properties of RNA, and is used for targeted RNA cleavage experiments, some with proposed therapeutic applications."
--https://en.wikipedia.org/wiki/Hammerhead_ribozyme

This model is of the Hammerhead ribozyme (1hmh-A_fixed.stl; blue in the figures) in complex w