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. 2022 Mar;28(3):371–389. doi: 10.1261/rna.079025.121

FIGURE 4.

FIGURE 4.

Bud23 coexists on 40S precursors with the Rps0-cluster proteins. Bud23 and Rio2 associate with pre-40S particles containing the Rps0-cluster proteins as shown by the coimmunoprecipitation of Rps2–FLAG, Rps0, or Rps21-HA with the indicated GFP-tagged baits. (A) Rps2–FLAG coimmunoprecipitated with Bud23–GFP (AJY4722) and Rio2-GFP (AJY4723) but not the Processome factor Utp9-GFP (AJY4721). Asterisks (*) denote the GFP-tagged baits. (B) Rps0 and Rps21A-HA coimmunoprecipitated with Bud23–GFP (AJY4767) and Rio2-GFP (AJY4768) but not Utp9-GFP (AJY4766) nor were they present in a negative control that used cells with no bait (No Tag; AJY4732). The Processome/pre-40S factor Pno1 is shown in A, and the Processome factor Imp4 is shown in B as positive controls for the copurification of preribosomal particles. Rpl8 is shown in B as a specificity control for contamination of mature ribosomes.