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pH=2.0-10?!

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whywhywhy:
what does it mean when a solution has a pH 2.0-10? usually a solution only has one specific pH value, but what about pH 2.0-10?

i have no clues   :-\

movies:
Yeah, that doesn't make any sense to me either.  What context did you see this in?

whywhywhy:
hmm... it is a pH gradient, but what values does the range cover? from 2 to 10 or only 2 and 10?   ::)

in proteomics.

movies:
It must be 2 to 10, not 2 and 10.  A jump that big wouldn't be much of a gradient at all....

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