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Registered User
residue of a stupid question
In my reading of this forum, I come across the term 'residue' from time to time. Is this a term for amino acids? Or their side chains?
ms
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Moderator
residue = amino acid residue - called a residue because a 'free' amino acid has an extra H2O attached to it. When two amino acids bond together to form a peptide, they lose a water molecule in forming the peptide bond between them, so whats left is the amino acid 'residue'. (Probably more detail than you wanted )
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Registered User
peptides vs. amino acids
Thanks Howard. And the level of detail was just what I was after. I'd forgotten my High School chemistry. The level of detail was fine.
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Registered User
oops hit enter too soon... if two amino acids bond to form a peptide, and a protein is a collection of AAs, what's the difference between a peptide and a protein?
ms
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Moderator
A peptide is just generally shorter than a protein, but no real difference. Basically a piece of a protein is referred to sometimes as a peptide or polypeptide.
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