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. Author manuscript; available in PMC: 2022 Sep 10.
Published in final edited form as: Science. 2021 Sep 10;373(6560):eabj5338. doi: 10.1126/science.abj5338

Fig. 1. Nucleolar maturation of human SSU processome.

Fig. 1.

(A) Cryo-EM density maps of nucleolar states pre-A1, pre-A1*, and post-A1 at 3.6, 3.9, and 2.7 Å, respectively. Modules, assembly factors, and RNA are labeled, and compositional changes are indicated at the bottom. (B) Atomic models of the three states displayed and labeled as in (A). (C) Structures of RNA elements in each state. 5′ domain, green; central domain, beige; 3′ major domain, gray; 3′ minor domain, light pink; 5′ ETS, yellow; U3 snoRNA, pink.