One example of these molecules regulates the production of GlmS based on glucosamine-6-phosphate presence in the cell. Another of these molecules has an activity-essential motif consisting of G5, G8, 
One example of these molecules regulates the production of GlmS based on glucosamine-6-phosphate presence in the cell. Another of these molecules has an activity-essential motif consisting of G5, G8, and G12, as well as a U-turn that gives it its namesake shape. Examples of these molecules capable of catalyzing in vivo Diels-Alder reactions were described by Seelig. Another type of them might allow for production of HIV-resistant T-cells. They provide evidence for Gilbert's RNA world hypothesis, and these molecules are capable of hydrolyzing their own phosphodiester bonds. For 10 points, give this term for RNA molecules with enzyme-like catalytic activity, such as the "Hammerhead" type.
One example of these molecules regulates the production of GlmS based on glucosamine-6-phosphate presence in the cell.
 ribozymes [prompt on RNA before mentioned]