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Protein Structure - Flashcards
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- 1Primary StructureThe unique amino acid sequence that forms a polypeptide chain; this is genetically determined.
Bonds: covalent peptide bonds - 2Secondary StructureRepeated twisting/folding of neighbouring amino acids. Two forms; alpha-helix and beta-pleated sheet.
Bonds: hydrogen bonds - 3Tertiary StructureThe 3D shape of the polypeptide chain and this shape determines the function of the protein.
Bonds: disulphide covalent bonds and hydrogen bonds - 4Quaternary StructureThe arrangement of multiple polypeptide chains.
Bonds: held together by forces of the side chains i.e. Wan der Waals, hydrogen bonds, ionic bonds, covalent bonds - 5Fibrous ProteinsStructure: long parallel strands
Features: insoluble in water, have structural functions
E.g. collagen, elastin, keratin, actin and myosin - 6Globular ProteinsStructure: spherical (globular) in shape
Features: more or less soluble in water, have metabolic functions
E.g. enzymes, antibodies, complement, haemoglobin, lipoproteins, albumins, membrane proteins, hormones like insulin
Informationen
- Beschreibung
- Protein structures: What is this structure? What are the bonds? Protein classes: What are the characteristics/functions? Name some examples.
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- Abbie N
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