DNA Doodling: Enzymes Write Long DNA Strands Without Templates
Scientists have shown that DNA polymerases can generate long, patterned DNA without a template, producing tens of thousands of units by adjusting reaction conditions such as temperature and building-block availability. The output forms identifiable repeating patterns rather than random strings, suggesting a tunable pathway for long DNA synthesis with potential biotech applications, though researchers caution about error control and the uncertain behavior in living systems.