Also: DNA origami, molecular robots
Tiny machines built from folded DNA that can carry cargo or walk along tracks.
Only what the cited papers report.
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Douglas, Bachelet and Church built a DNA nanorobot that opens to deliver molecular payloads only when aptamer logic gates sense the right cell-surface cues.
As reported in: Douglas, Bachelet, Church (2012). A Logic-Gated Nanorobot for Targeted Transport of Molecular Payloads. Science. doi:10.1126/science.1214081
Abstract only
Lund and colleagues showed DNA "molecular spiders" moving on DNA origami landscapes autonomously carry out start, follow, turn and stop actions.
As reported in: Lund, Manzo, Dabby et al. (2010). Molecular robots guided by prescriptive landscapes. Nature. doi:10.1038/nature09012