Levels of Protein Structure

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Document Summary

Less than 50% of the average is secondary structure. Hydrogen bonding to an electronegative atom requires 3 atoms to do so. All depend on hydrogen bonding between the backbone (secondary structures) Hydrogen bonds form when a hydrogen atom is sandwiched between two electron-attracting atoms (usually o or n) Hydrogen bonds can occur between the polypeptide backbone and water, and the protein backbone and other neighbouring polypeptides. Side chains stick out due to the lack of interior space. Proline causes a kink problem alpha helix breaks. Beta sheets follow the same bonding rules as the alpha. The bonding is still hydrogen not side chain. Beta sheets run in 2 ways anti parallel the n terminus of one is butted beside the. Parallel beta sheets all have the same c and n lined up, main. In parallel it involves wrapping around of the peptide chain.

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