Protein Crystal Molecules Question

Kita91188 · #1 (**permalink**) 09-14-2007, 03:49 AM

I have this question-- can anyone solve it, and how did you solve it? To the nearest power of 10, how many protein molecules with a molecular
weight of 25,000 are found in a crystal that is 3 mm on each side?
(Assume that a crystal is 50% water and that the density of a protein is
the same as that of water)

thanks!

kmunson779 · #2 (**permalink**) 09-14-2007, 02:41 PM

The key here is, "assume the density of a protein is the same as that of water".

This gives you a conversion between volume (of the cube) and mass (of the protein).

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Protein Crystal Molecules Question

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