Scientists have created a new method for storing and overwriting data in DNA. Developed by researchers at the University of Cambridge published in the journal Nano Letters.
The main difficulty in converting digital information (0.1) into a DNA code (consisting of a chain of nucleotides designated A, G, C and T) is the complexity and cost of the chemical process. In addition, reading data stored in a base pair sequence is also a slow and expensive process.
Although DNA sequencing technology is already widely used, it is inconvenient for reading specially encrypted information: the fact is that the method is based on the replication of billions of copies of a molecule to amplify signals from protein interactions.
There is a second approach, which involves passing a DNA molecule through nanopores and reading information from it in real-time. Despite the fact that reading bits from base pairs in the main DNA chain is cheaper and more efficient, while this process takes too much time.
The new method proposed by the researchers relies on the second method of reading data from DNA. The recording and reading system consists of the binding of complementary single-stranded DNA to streptavidin molecules. If, when passing through nanopores, changes in the ion current show the presence of streptavidin, this element is read as a unit, if a molecule is absent, it is zero.
In the future, this method will make it easy to record, as well as store encrypted data and overwrite them, the authors of the study note.