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15 Cards in this Set

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