DNA walkers
... that DNA walkers have been used as nanorobots to pick up and drop off molecular cargo?
... that <b id="mwCYc"><a href="./DNA_walker" id="mwCYg" rel="mw:WikiLink" title="DNA walker">DNA walkers</a></b> have been used as <a class="mw-redirect" href="./Nanorobots" id="mwCYk" rel="mw:WikiLink" title="Nanorobots">nanorobots</a> to pick up and drop off molecular cargo?