Proteins let cells remember how well their last division went

EnlargeMartin Barraud

When we talk about memories in biology, we tend to focus on the brain and the storage of information in neurons. But there are lots of other memories that persist within our cells. Cells remember their developmental history, whether they’ve been exposed to pathogens, and so on. And that raises a question that has been challenging to answer: How does something as fundamental as a cell hold on to information across multiple divisions?

There’s no one answer, and the details are really difficult to work out in many cases. But scientists have now worked out one memory system in

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