Fig. 5
From: Complex wireframe DNA nanostructures from simple building blocks
Three-dimensional (3D) multi-layer arrays with 6-arm vertices. a Escher’s woodcut Depth. b DNA duplexes (highlighted in red) overlaid on a grid analog to Depth. c 4 × 4 × 4 array. d 8 × 8 × 4 array. Panels from top to bottom (c and d): Schematic diagrams; cryo-EM images (left) and examples of two-dimensional (2D) classification results (right); 3D maps, and different views of 3D electron density maps. (M.C. Escher’s Depth © 2019 The M.C. Escher Company—the Netherlands. All rights reserved. Used by permission. www.mcescher.com)
