Protein Structure. FDSC400. Biological?. Food?. Protein Functions. Protein Structure. 20 Amino Acids. Coded in DNA. Primary. Secondary. Self assembly to a single (native) structure. Depends on primary structure and solution conditions. Tertiary. ( ). Quaternary.
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20 Amino Acids
Coded in DNA
Self assembly to a single (native) structure. Depends on primary structure and solution conditions
Common in foods. Many non-native forms depending on protein structure, solution conditions (& history) and ingredient interactions
Chiral carbon (L-series)
Parallel or antiparallel
b-strands typically 5-15 A.A.
More stable than a-helixb-Sheet
Hydrophobic amino acids
Many insoluble amino acids, protein tends to minimize surface/volume ratio
Interacts well with water and takes up a random configuration
Strong secondary structure allows protein to retain a non-spherical shape
Folded protein unable to contain some hydrophobic residues
Dimerized protein shields the hydrophobic amino acids from water