Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Proposed model of the Tetrahymena ribozyme transition state from functional data (ref 10 and references cited therein and this work). Bonds made and broken at the transition state are represented by dashed lines. Hydrogen bonds are represented by hashed lines. Functional contacts between metal ions and their ligands are represented by solid dots of the same color of the metal ion; contacts from this work are in larger font.
