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OHS Amino Acids
Transcript of OHS Amino Acids
All amino acids have two groups in common: amino and carboxyl!
Amino acids are grouped according to common characteristics
Interactions: Dispersion and hydrophobic
Different side chains = variability in packing together
Methionine starts all proteins!
Interactions: Cysteine disulfide bonds
often the active site of enzymes
Different length side chains for variability
Note: these structures are shown as the salt form.... what would you call them?
Notice anything about these two
compared to the acidic amino acids?
Same side chain with either
an acid group or an amine group!
Contain a benzyl/phenyl group - Bulky
Tyr and Trp can H-bond (label partial charges!)
Useful to put reactive groups in a hydrophobic environment
Contain a non-benzyl/phenyl ring
Trp is BOTH Aromatic and heterocyclic
Very large and reactive groups
Proline wraps around to form a ring
with the amino group in the backbone.
Amino acids are coupled together using peptide bonds:
These are amide bonds!