Accumulating products make reaction droplets move, which speeds up reactions.

Chemical droplets called condensates can speed up reactions by gathering starting ingredients together. But as finished products pile up inside them, this speed boost usually disappears. Researchers investigated how to fix this issue. They discovered that when built-up products break down or suppress the droplets, the system naturally forms moving shapes through spontaneous symmetry breaking. These condensate regions rotate, stretch, and travel forward. As they move, they carry the concentrated ingredients away from the leftover products that would otherwise slow things down. Because the droplets constantly shift reaction sites, the reaction runs faster than it would in still, unchanging droplets or in evenly mixed solutions. This shows chemical reactions can organize their own moving micro-reactors.

Why it matters

In cells, proteins and RNA often form liquid droplets that speed up chemical reactions. But as products build up, those droplets can lose their advantage. This research shows that product buildup actually makes the droplets reorganize themselves, keeping reactions fast despite the waste. That could change how we think about cellular organization and help design self-sustaining synthetic reactors.

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