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Mark Van Arsdale

on 21 September 2016

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Transcript of Proteins

CLASSIFICATION is based on properties of side chain
H+ has been donated to solution
H+ has been removed from solution
O present, sometimes S
Formation of peptide bonds uses dehydration synthesis, in amino acids it connects the amino group of one to carboxyl of another
Amino Acid Structure
Denaturation changes a protein’s shape which in turn changes its activity
No O present in side groups, lots of methyl, lots of rings
Sequence of amino acids, as determined by the genes
Regular repeated folding of peptide chains, stabilized by H bonding
Irregular contortions, stabilized by H bonds,ionic bonds, hydrophobic interactions, and disulfide bridges
Interaction of several polypeptide chains
General Characteristics
Polymers of amino acids
Each has unique 3-D shape based on a unique sequence of amino acids
Each varies in its sequence of amino acids
They are the building blocks of enzymes, contractile proteins, structural proteins, and receptor proteins
Sequence Determines Structure
How does it happen?
High temperature
Change in pH

Organic solvent
Full transcript