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. 2022 Jun 29;607(7918):393–398. doi: 10.1038/s41586-022-04790-2

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — a,b, Domain organizations of Dicer-2 (a) and R2D2 (b). c, Nucleotide sequence of the let-7 siRNA duplex. d,e, Overall structure of the Dicer-2–R2D2–siRNA complex. The Dicer-2–R2D2 heterodimer is shown as ribbon (d) and surface (e) models. PLH, pincer-like helix; DPL, DUF283–platform linker; CH, connector helix; CL, central linker.