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. Author manuscript; available in PMC: 2012 Oct 15.
Published in final edited form as: Methods. 2009 Aug 3;49(2):148–166. doi: 10.1016/j.ymeth.2009.07.005

Figure 17.

Figure 17

View of the active site of the group I ribozyme derived from bacteriophage Twort (PDB file 1Y0Q). Numbering and colors are as in Figure 16.