• The idea is that DNA molecules will pair to form a double helix -- so if you coat specific areas with DNA, then float cells with that DNA's complement past it, they'll stick to the predefined pattern.
  • So the researchers used an inkjet-style printer to coat areas of a microscope slide with DNA, then washed it with cells with the DNA's compliment. They stuck together in the predefined pattern. The researchers were even able to add a second population -- or "layer" of cells that stuck to the first population. Then the researchers cover them with a solution that turns into a cell-friendly "gel," and the hope is, they'll eventually form tissue.
  • Eventually, this tech could be used to print organic tissues or organs. But right now it's very early stage.

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