Researchers in the US have demonstrated a means to use short sections of DNA as rewritable data "bits" in living cells.
The technique uses two proteins adapted from bacteria to "flip" the DNA bits.
Though it is at an early stage, the advance could help pave the way for computing and memory storage within biological systems.
A team reporting in Proceedings of the National Academy of Sciences say the tiny information storehouses may also be used to study cancer and aging.
The team, from Stanford University's bioengineering department, has been trying for three years to fine-tune the biological recipe they use to change the bits' value.
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