Fig. 5: Tetromino assembly based on a quadruple-unit system.
From: DNA dynamics and computation based on toehold-free strand displacement
There are four origami cuboid units (8H × 8H × 10T) in the system (I, II, III, and IV), and each unit with four sticky faces to bind with sticky faces of the matching units (convex and concave in a matching color depict a certain face pair). The sets of blockers in the presence (blockers in use highlighted in respective colors while blockers not in use faded in gray) react with the four basic units to result in the formation of one of the seven tetrominoes, T-, I-, O-, J-, L-, S-, and Z-tetrominoes. Scale bars: 25 nm.
