Peptide bond

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Saintsfan44
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Peptide bond

Post by Saintsfan44 » Sun Feb 01, 2009 4:49 pm

Ok this is probably a stupid question but...In a peptide bond, does the carboxyl group of the amino acid donate an O and H+ and then the other amino acid donates one H+ from the amino group?
My textbook makes it seems that the carboxyl group group donates only one O and the amino group donates 2 H
Its really confusing because after the peptide bond is made there is only one H and it is on the amino group...so wouldnt that mean that 3 H and one O have been lost?

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Saintsfan44
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Re: Peptide bond

Post by Saintsfan44 » Sun Feb 01, 2009 6:03 pm

Nvm I'm pretty sure i figured it out...becuase of the pH values in cells, the carboxyl group and amino group are ionized so the carboxyl group loses a proton and the amino group gains one.

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