Volume 91 Issue 38 | p. 8 | News of The Week
Issue Date: September 23, 2013

Why Are Cells The Size They Are? Gravity May Be A Factor

Cell Biology: Bigger cells such as frog eggs have evolved a protein mesh to keep insides from settling to the bottom
Department: Science & Technology
News Channels: Analytical SCENE, Biological SCENE
Keywords: cell biology, gravity, nucleus, organelles, cell size

Eukaryotic cells, which are defined by having a nucleus, rarely grow larger than 10 μm in diameter. Scientists know a few reasons why this is so. For example, cells with a larger volume have a harder time obtaining nutrients from their surroundings. A new study suggests another reason—gravity (Nat. Cell Biol. 2013, DOI: 10.1038/ncb2830).

Scientists had thought gravity’s effects at the cellular . . .

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