Science

How enzyme activity can accelerate molecular movement inside cells

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 08/10/2026, 21:25:25 UTC.

Briefings

A recent study challenges the traditional view that molecular movement inside cells is purely random. The evidence suggests that specific enzymes can actively accelerate this motion, allowing molecules to reach the cell surface more efficiently than previously thought. This mechanism transforms the cell from a passive recipient of drift to an active participant in molecular transport, potentially explaining how nutrients bypass the need for direct binding to the cell membrane.

Key points

• Enzymes within the cytoplasm can actively increase the speed of molecular diffusion, reducing the time required for a molecule to reach the cell surface from seconds to milliseconds.
• This enzymatic acceleration creates a directed flow of molecules that effectively overcomes the random thermal motion, allowing nutrients to reach the cell surface with significantly higher probability than random drift alone would suggest.

Context and limitations

The study relies on in vitro measurements of isolated enzyme systems and does not yet provide direct evidence of this mechanism operating inside intact living cells under physiological conditions.

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