Mike Raiford wrote:
> Invisible wrote:
>> http://upload.wikimedia.org/wikipedia/commons/2/2e/Crowded_cytosol.png
> 
> I'm guessing some sort of protein?

Several of them, actually.

It's linked from an article on "macromolecular crowding", which explains 
that when you have really, *really* high concentrations of large 
molecules (such as proteins), the individual molecules get squished up 
against each other in such a way that it radically changes the chemistry 
of the whole solution.

This is partly why proteins don't behave the same way in a testtube as 
they do in a real, living cell...

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