Researchers at Maynooth University in Ireland have developed the Scaffolded DNA Computer (SDC), a molecular system that performs mathematical operations without electronic logic circuits. Instead of traditional transistors, the computer utilizes DNA base interactions—adenine, thymine, cytosine, and guanine—to process information.
The system is built using DNA origami technology, where a long DNA strand and hundreds of synthetic fragments self-assemble in a water and salt solution through heating and cooling cycles. The algorithm logic is encoded directly into the DNA sequences, and the final configuration of the molecules after chemical reactions represents the calculation result.
During testing, the SDC successfully executed ten different programs, including addition, subtraction, multiplication, and division, handling data lengths of up to 100 bits without errors. While the logic operations do not require electricity, the process relies on external laboratory equipment for heating, DNA synthesis, and data reading.
The developers suggest that molecular computing could be applied in environments where silicon processors are impractical. Potential future applications include performing calculations directly within living cells to monitor biological processes or detect disease markers, though the technology currently remains in the experimental laboratory phase.
