A DNA 'on-off' switch? Light and redox cues reversibly link strands for nanotech

DNA, the blueprint for life, is best known for its fundamental role as genetic material: storing and transmitting biological information through the precise sequence of its bases. For decades, this information storage function has defined how we think about DNA. What if DNA could do more than code life? What if it could act as a reaction vessel that precisely guides and controls specific chemical reactions?