NItrogen how many do we have?

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NItrogen how many do we have?

Post by klapausius » Fri Feb 11, 2011 1:00 pm

How many nitrogen atoms on average is present in a single human cell?
here are the information that i have found;
For DNA;
it contains A(6N) G(6N) T(2N) C(3N), human genome = 3 billion bases, G+C= 41%, with these info i can calculate the number of Nitrogen atoms in a cell,
For proteins;
each amino acids have 1N
and these amino acids have N(1),P(1),H(2),L(1),W(1),Q(1),R(3) nitrogen atoms on their side chains

what i am unable to find is the number of amino acids on average a human cell has

for now i can only think of DNA and proteins..however are there any other molecules that i should account for as a major contributor of Nitrogen in a cell?

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Post by JackBean » Fri Feb 11, 2011 7:09 pm

you forgot the RNA. And there are plenty of low-molecular substances like free nucleobases (remember ATP etc.) and free amino acids.

Cis or trans? That's what matters.

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Re: NItrogen how many do we have?

Post by jonmoulton » Fri Feb 11, 2011 10:42 pm

Perhaps this would be easier if you can find the total mass of nitrogen in an average human. Convert to moles and divide by the number of cells in a human.

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