Stretches of non-coding DNA in genes called introns could have an important survival function, two new studies found. In baker's yeast, introns repress ribosomal-protein genes when food is in short supply to conserve energy.

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Stretches of non-coding DNA in genes called introns could have an important survival function, two new studies found. In baker's yeast, introns repress ribosomal-protein genes when food is in short supply to conserve energy.