Topic: Biology

Harvard researchers have created a silicon chip that can write 64 different DNA sequences at once. This breakthrough uses a water-based approach to manufacture synthetic DNA, which is essential for many areas of science and medicine.

Silicon chips are the foundation of modern computing. But now, scientists have given them a new role in biotechnology. They're using these chips to study living systems by recording activity from neurons, reading DNA, and even creating DNA.

A team of researchers at Harvard University has developed a silicon chip that can synthesize 64 different DNA sequences at the same time. This is a major breakthrough because it uses a water-based approach instead of the traditional chemical process. The device uses carefully controlled electrical currents to trigger DNA building reactions at specific locations across the chip.

The research was led by Donhee Ham, a professor at Harvard's John A. Paulson School of Engineering and Applied Sciences. He and his team used a silicon chip with 64 synthesis sites, each featuring two concentric ring electrodes surrounding DNA molecules anchored at the center. When a specific location is activated, the inner electrode generates protons that lower the local pH and allow the DNA strand to grow.

This technology has the potential to revolutionize the way we manufacture synthetic DNA. Currently, most custom DNA is produced using phosphoramidite chemistry, which depends on hazardous organic solvents and requires specialized facilities. The enzymatic approach used by the Harvard team could eventually enable smaller, safer, and more widely available DNA synthesis systems.

Why It Matters

This breakthrough has significant implications for medicine and science. Synthetic DNA is essential for diagnosing diseases, understanding genetics, and developing new treatments. With this new technology, scientists may be able to create custom DNA sequences more easily and safely, leading to new discoveries and advancements in these fields.

Key Facts

• Harvard researchers have created a silicon chip that can write 64 different DNA sequences at once.
• The device uses a water-based approach instead of the traditional chemical process.
• Donhee Ham led the research team at Harvard's John A. Paulson School of Engineering and Applied Sciences.
• The technology has the potential to revolutionize synthetic DNA manufacturing, making it safer and more widely available.
• Synthetic DNA is essential for many areas of science and medicine, including diagnostics, genome engineering, and cancer research.

Key Terms

Enzymatic

Using enzymes, which are biological molecules that speed up chemical reactions.

Deprotection

A process where a blocking group is removed from DNA to allow it to grow.

Implications

This breakthrough has significant implications for medicine and science. Synthetic DNA is essential for diagnosing diseases, understanding genetics, and developing new treatments. With this new technology, scientists may be able to create custom DNA sequences more easily and safely, leading to new discoveries and advancements in these fields.