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Molecular diffusion units, can't make sense of them


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#1 mcb56

mcb56

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Posted 18 November 2011 - 06:16 PM

Hello,
I am reading a paper that says the diffusion coefficient of proteins in the nucleus is 10-100 um2/sec (micrometers squared/second). Why is this in units of area/second (um raised to second power) instead of volume (um raised to third power)? This are 3d molecules that can diffuse in any direction.

Thanks




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