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15 Cards in this Set
- Front
- Back
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What is a primary structure?
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the sequence of amino acids.
held together by peptide bonds |
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What is secondary structure?
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coils and folds in chain
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what is tertiary structure?
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global folding and further folds due to water interactions and stabilized by R-group interactions.
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what is quaternary structure?
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(in some proteins) -2 or + polypeptides come together.
-may also have heme group |
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what are the functions of enzymes?
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-speed up reaction
-lower energy req'd for reaction -are not consumed in process |
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define Reaction
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condensation/ dehydration for putting substrates together. (h20 produced)
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what is allosteric regulation?
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-how cells control enzyme activity
-restricts enzyme production -inhibits action of enzymes |
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what is the function of allosteric site?
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-inhibits or stimulates activity
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what is the function of allosteric activator?
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-keeps shape of enzyme
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what is the function of allosteric inhibitor?
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-keeps enzyme in inactive shape
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what is the function of feedback inhibition?
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-controls metabolic pathways
-is reversible if product/ inhibitor is used |
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what is the function of noncompetitive inhibitor?
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binds to enzyme, not active site. changes shape of enzyme
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-what is the function of enzyme inhibitor?
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same shape as substrate, takes place of active site, can be reversed.
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what is the function of cofactors?
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needed by enzymes, binds to active site or substrate
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what is the function of pH?
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-changes in pH alters state of ionization of amino acids.
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