From http://www.nature.com/news/dna-robot-could-kill-cancer-cells-1.10047 Nature News 16 February 2012 DNA nanorobots can target cancer cells and deliver an antibody payload (purple). Image created by Campbell Strong, Shawn Douglas, & Gaël McGill using Molecular Maya & Cadnano. QUOTE: "Once the device recognizes a cell, it automatically changes its shape and delivers its cargo... Whether or not these structures will work in a living organism remains to be seen ... the nanorobots are quickly cleared by the liver or destroyed by nucleases, enzymes that chew up stray bits of DNA." END QUOTE