'Covalent catalysis' diaporamas de présentation

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ENZYMES

ENZYMES

ENZYMES. Enzymes are proteins. Cofactors. Prostetic groups Metal ions Coenzymes. Covalent bond. Coordinative bond. Secondary interactions. Native conformation. Optimal Conditions :. pH. Ionic strength. Temperature. Solvent. Maximal catalytic activity. Active center:. Asp b COOH.

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1.49k views • 102 slides
Km Vmax Kcat

Km Vmax Kcat

Km is [S] at 1/2 Vmax It is a constant for a given enzyme at a particular temp and pressure Km is unique to each Enzyme and Substrate. It describes properties of enzyme-substrate interactions. Dependent on temp, pH etc. Independent of enzyme conc .

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1.51k views • 66 slides
Enzyme Mechanisms

Enzyme Mechanisms

Enzyme Mechanisms. Oxidoreductases catalyze oxidation-reduction reactions. Transferases catalyze transfer of functional groups from one molecule to another. Hydrolases catalyze hydrolytic cleavage.

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1.81k views • 51 slides
Enzyme Mechanisms

Enzyme Mechanisms

Enzyme Mechanisms. Oxidoreductases catalyze oxidation-reduction reactions. Transferases catalyze transfer of functional groups from one molecule to another. Hydrolases catalyze hydrolytic cleavage.

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635 views • 51 slides
Enzymes: Catalytic strategies & regulatory mechanisms

Enzymes: Catalytic strategies & regulatory mechanisms

Harini Chandra. Enzymes: Catalytic strategies & regulatory mechanisms.

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752 views • 38 slides
Biochemistry

Biochemistry

Biochemistry. Lecture 8. Why Enzymes?. Higher reaction rates Greater reaction specificity Milder reaction conditions Capacity for regulation. Metabolites have many potential pathways of decomposition Enzymes make the desired one most favorable. Enzymatic Substrate Selectivity. No binding.

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447 views • 30 slides
Two Substrate Reactions

Two Substrate Reactions

Two Substrate Reactions. Many enzyme reactions involve two or more substrates. Though the Michaelis-Menten equation was derived from a single substrate to product reaction, it still can be used successfully for more complex reactions (by using k cat ). Random. Ordered. Ping-pong.

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830 views • 28 slides
Lecture 12

Lecture 12

Lecture 12. Enzyme mechanisms. +. HB. +. NADH. Common enzyme reactions. Oxidation and reductions (cofactors are involved!). (Oxidation of an alcohol to a ketone). +. +. B :. NAD +. H. O. + BH +. C. H. C. O. H. R. BH +. H. C. O. H. H. B :. C. O. R.

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512 views • 26 slides
Enzyme Catalysis

Enzyme Catalysis

Bill Royer Office: LRB 921 Phone: x6-6912. Enzyme Catalysis.

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2.8k views • 22 slides
Lecture 12: Enzyme Catalysis

Lecture 12: Enzyme Catalysis

Lecture 12: Enzyme Catalysis. Catalytic Strategies Steps in a Reaction. Enzymes are Classified According to the Reactions They Catalyse. But while the details of the particular reaction vary from enzyme to enzyme, similar strategies are used to carry them out. . Common Types of Catalysis.

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1.32k views • 20 slides
Chapter 6.1 and 6.2: Introduction to Enzymes

Chapter 6.1 and 6.2: Introduction to Enzymes

Chapter 6.1 and 6.2: Introduction to Enzymes. CHEM 7784 Biochemistry Professor Bensley. CHAPTER 6.1 and 6.2 Introduction to Enzymes and How Enzymes Work. Physiological significance of enzymes Origin of catalytic power of enzymes Chemical mechanisms of catalysis.

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658 views • 20 slides
RNA and Nucleic Acid Reactions

RNA and Nucleic Acid Reactions

RNA and Nucleic Acid Reactions. C483 Spring 2013. 1. Which is not a difference between RNA and DNA? A) RNA is more prone to basic aqueous hydrolysis. B) RNA contains uracil; DNA usually does not. C) RNA cannot form helices. D) RNA is usually single-stranded; DNA is double-stranded.

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306 views • 17 slides
CHYMOTRYPSIN

CHYMOTRYPSIN

INTRO. CHYMOTRYPSIN. MISSION:. To cleave peptide amide bonds of protein in small intestine. Cleave carboxyl terminus of large nonpolar or aromatic side chains i.e. Tyr, Trp , Phe , and Met Initial general acid-base catalysis Covalent nucleophilic catalysis. STRATEGY:. Protease

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293 views • 9 slides

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