Term
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Definition
| 3 polypeptide chains wrapped around each other in a ropelike twist to form a triple helix |
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Term
| What are 3 polypeptide chains wrapped around each other in a ropelike twist |
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Definition
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Term
| In a tropocollagen, is each polypeptide chain a helix? |
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Definition
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Term
| What holds the 3 strands together in a tropocollagen? |
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Definition
| Hydrogen bonding involving hydroxyproline and hydroxylysine |
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Term
| What happens with age in tropocollagen helices? |
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Definition
| Cross linked by covalent bonds fromed between lys reidues |
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Term
| What is the definition of a quaternary structure? |
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Definition
| Interaction of 2 or more polypeptide chains in a protein |
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Term
| What are the chains of a quaternary structure called? |
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Definition
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Term
| Are the subunits in a quaternary structure the same or different? |
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Definition
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Term
| Does each individual chain in a quaternary structure have its own 1, 2 and 3 degree structure? |
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Definition
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Term
| What are conjugated proteins? |
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Definition
| They contain materials other than amino acid chains |
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Term
| What are examples of materials in conjugted proteins? |
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Definition
| glycoproteins-sugars; lipoproteins-lipids; matals and small organic groups; hemoglobin-heme group; and prosthetic groups-non sugar or lipid group |
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Term
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Definition
| the overall structure of a protein |
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Term
| Name 4 conformations of proteins: |
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Definition
| primary, secondary, tertiary and quaternary |
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Term
| What is unique about a secondary protein? |
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Definition
| pattern is in a backbone shape with arrangement of alpha helix and beta sheaths |
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Term
| What is unique about tertiary proteins? |
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Definition
| 3-d shape, no pattern, random coil, alpha and bets sheaths |
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Term
| What is unique about a quaternary structure? |
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Definition
| several protein chains come together and stick to one another |
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