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BIOCHEM 2EE3 (153)
Lecture 9

Biochemistry 2EE3 Lecture 9.docx

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Department
Biochemistry
Course
BIOCHEM 2EE3
Professor
Karen Mc Garry
Semester
Winter

Description
Biochemistry 2EE3 Lecture 9 • • • • • • • There are more and less sensitive enzymes in regards to shape • Geometric complementarity: does not mean that other forms do not exists (exist L-types can still bind to D-type enzymes), they are just unstable and do not last long o Ex. can put right-handed glove on left hand, it is just uncomfortable and you switch it back quickly • Bonds between enzymes and substrates are specifically strengthened to form a specific lifetime of complex (<1 millisecond) o Boltzmann,Arrhenius tells life of complex and energy of reaction relationship • • • Enzymes always decrease energy barrier • How they do it depends on the factors involved • Exergonic: energy released • Energy barrier is important because it makes sure reactants go to products and stay there, and that reaction only occurs in certain circumstances • • • Atom to bond, bond to bond, bond to atom • Never atom to atom! • • Keto-enol tautomerization: naturally uncatalyzed • With acid catalysis, hydrogen on acid attracts n
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