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1 (Primary)
N-C-C-N-C-C
- -the sequence of amino acids (ala thr set tyr his gly)
- -the N-C-C backbone
- -the level held together entirely by strong forces
- -the strand that indicated the path of the bonded chains
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2 (Secondary)
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- -beta-sheet
- -held together by repeating patterns of hydrogen bonds which are roughly perpendicular to the chain axis
- -alpha-helix
- -regularly placed hydrogen bonds within the same chain (perpendic intramolecular h-bonds)
- -regular patterns that show up clearly in x-ray crystallographic analysis
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3 (Tertiary)
- -may have some disulfide covalent bonds as cross-links
- -mainly caused by proline, charge attractions, charge repulsions, and weak forces
- -the way the polypeptide chain is folded to form a compact globular structure
- -the level of protein structure most responsible for the lock-and0key mechanism of enzymes
- -oil dropo model describes the force that cause this level
- -domains, which show 3d homology to comparable proteins in related species
- -has bits of "irregular structure" or "random chain" and "bend regions"
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4 (Quaternary)
- -association of clustering of several globular units
- -the level of structre that myoglobin doesnt have
- -supramolecular aggregation
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