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Chapter_5_fall_2008

518 polypeptide fig 518 protein shape or confirmation

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Unformatted text preview: yl and amino Bond groups of two amino acids groups Bond forms by CONDENSATION Polypeptide has amino and carboxy ends Fig. 5.18 Polypeptide Fig. 5.18 Protein shape or Confirmation Confirmation determines functionality determines Shape is controlled by four possible Shape levels of structure structure 1. Primary - amino acid sequence 1. Primary 2. Secondary - coils and folds of primary 2. Secondary chain chain 3. Tertiary - shape produced by 3. Tertiary bonds between side chains bonds 4. Quaternary - aggregation of 4. Quaternary polypeptides polypeptides Primary Structure (protein Primary confirmation) - amino acid sequence as determined by genetic code genetic Fig. 5.20 Page 82 Secondary Structure (protein confirmation) - coils and folds of primary chain (hydrogen bonds in backbone) chain Fig. 5.22 Tertiary Structure (protein confirmation) Tertiary shape produced by bonds between side chains chains Hydrogen Hydrogen bonds bonds Hydrophobic Hydrophobic interactions interactions Disulfide bonds Ionic bonds Fig. 5.20 Quaternary Structure (protein confirmation) - aggregation of polypeptides aggregation Fig. 5.20 Page 83 Importance of structure to proteins shape and function and Hemoglobin...
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