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Fig. 5. Pre-rRNA processing pathway in yeast. (A) Structure of 35S pre-rRNA. (B) Physiological pathway of 35S pre-rRNA processing. Final steps of 5.8 and 25S maturation are not shown. Processing sites and intermediates are indicated. For more details, see Venema and Tollervey (1995); Kressler et al. (1999).
