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Topic: Isoelectric point of amino acids  (Read 4007 times)

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Offline mass

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Isoelectric point of amino acids
« on: October 20, 2008, 03:35:10 PM »
According to my notes, in order to calculate the isoelectric point of a acidic amino acid the equation is:

pi = 1/2 (pka cooh + pkaR)

Is the R a variable r group or some specific functional group? ester perhaps?
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Offline Arkcon

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Re: Isoelectric point of amino acids
« Reply #1 on: October 20, 2008, 08:01:59 PM »
Each of the physiological amino acids has a different R group.  It's attached to the chiral carbon, that also has the amino, the carboxlyic and another hydrogen.  With the notable exception of proline, the imino, amino acid. ;D
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Offline Arkcon

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Re: Isoelectric point of amino acids
« Reply #2 on: October 20, 2008, 08:12:42 PM »
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.
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