Quaternary Structure

Quaternary Structure - Quaternary Structure: structure...

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Quaternary Structure: structure following interaction and bonding between two or more (the same or different) polypeptide chains - hydrogen or ionic bonding between polypeptide chains Denaturation: disruption of specific 3D structure of a protein by increasing temperature (boiling) or changing pH - may be reversible ( remember : the structure of a given polypeptide is specific as well as consistent and reproducible ) Enzymes: increase the rate of a chemical reaction by lowering its activation energy without increasing the temperature or pressure within a cell - most consist of a protein apoenzyme & a nonprotein cofactor ; an organic cofactor is called a coenzyme … the whole enzyme (apoenzyme & cofactor) is the holoenzyme - often assist each step of a metabolic pathway - each enzyme reacts with a specific substrate to form a specific product ; the part of an enzyme molecule where the substrate binds is called the active site - enzymes are not changed by chemical reaction (usually) Nucleic Acids:
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Quaternary Structure - Quaternary Structure: structure...

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