svedberg units

William L'Amoreaux, Ph.D. lamoreaux at postbox.csi.cuny.edu
Wed Feb 4 11:26:40 EST 1998


Todd wrote:
> 
> I am looking for someone who knows what units svedbergs are measured in,
> eg 70s and 80s ribosomes.  I am not sure of this....
>

A svedberg unit is a sedimentation coefficient of 1 x 10(-13) sec; a
sed. coef. is a rate per unit of centrifugal field and is determined by
the weight, shape and amount of hydration a particular molecule has for
a given solvent and temperature.

The short answer is that it measures the relative rate of sedimentation
compared to other macromolecules.



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