Extended Data Fig. 2 |. DNA-origami assembly and purification.

a, Agarose gel electrophoreses showing the dimerization yields of the 40-nm and 60-nm wide DNA channels at different MgCl₂ concentrations. Channel (dimer) bands are denoted by asterisks. The experiment was repeated three times with similar results. b, Different sizes of DNA channels purified by rate-zonal centrifugation. Agarose gel (1.5%) electrophoreses show the enrichment of DNA channel in fractions 11–13 (40 nm), 9–10 (60 nm), and 10–12 (45 nm), respectively. Well-folded nanostructure bands are denoted by asterisks. This experiment was repeated three times with similar results.