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Genes & Cells

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a giant clam

JUST THE FRILLS  Showy blue and green frills are the only visible parts of a kind of giant clam that traps itself for life inside the rocky mass of a reef by a process that’s been misunderstood for decades.

brain scan of cerebral atrophy

A VIRAL LINK? A brain showing cerebral atrophy, a loss of nerve cells, one of the main signs of Alzheimer’s disease.

mouse embryonic stem cells

MARKING THE SPOTS In this super-resolution microscope image of mouse embryonic stem cells, molecules of the enzyme that copies DNA instructions into RNA messages cluster in multiple spots within the nucleus. White spots have more of the enzyme, RNA polymerase II, concentrated in them than in the cooler blue spots.

Genes & Cells

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