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- Course
- BMSC (BMSC200)
- Institution
- University Of Saskatchewan (USask )
Scott Napper BMSC Notes
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Chapter 3: Amino Acids and Peptides Linear polymers of amino acids
For all amino acids the alpha carbon is bonded to 4 different groups, creating a
chiral center
Grouping Amino Acids
o Non-polar aliphatic
o Aromatic
o Polar, Uncharged
o Polar, +ve charged
o Polar, -ve charged
Nonpolar, Aliphatic Amino Acids (Non-Polar)
Glycine, Alanine, Valine,
Leucine, Isoleucine, Proline,
Methionine
Buried within the core of the
protein (since side chains
don’t want to interact with
Water)
All are non-polar
Determine whether
something is polar/non-polar
you look for
o Charge
For these amino acids, there is no charge for the side chains
o Hydrogen Bonding Capability
For these amino acids, there is no Hydrogen bonding capability for
the side chains
Glycine is the smallest (non chiral): Hydrogen side chain
Methionine: sulfur group in the side chains (and also cystine carries one)
Proline: its side chains has a ringed structure (found at polypeptide turns usually in
combination with glycine)
Aromatics
Ring groups as side chains
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