Calculating Protein Concentration

Jayakumar, R via (by R.Jayakumar from
Thu Jan 17 11:28:34 EST 2008

You need the amino acid sequence to calculate its molecular weight. Get
the protein amino acid sequence from NCBI, paste it into a tool like
	It will calculate the molecular weight of the protein for you.
Calculate the molarity from that.

-----Original Message-----
From: methods-bounces from
[mailto:methods-bounces from] On Behalf Of Yvonne Couch
Sent: Thursday, January 17, 2008 7:47 AM
To: methods from
Subject: Calculating Protein Concentration

I have two proteins of different molecular weights, how do I calculate
the molarity of any solution I dissolve them in?  For example Protein 1
is 15kDa and 1mg is dissolved in 1ml of water, how do I calculate how
many moles this is?

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