Organic Chemistry

Section 25.2 Niacin: The Vitamin Needed for Many Redox Reactions 1041 The differentiation between the coenzymes used in cataboli ...

1042 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism and releasing cysteine. Notice that at the end of the react ...

Section 25.2 Niacin: The Vitamin Needed for Many Redox Reactions 1043 recognized by the enzyme. Molecular recognitionallows the ...

1044 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism 25.3 Flavin Adenine Dinucleotide and Flavin Mononucleotide: ...

Section 25.3 Flavin Adenine Dinucleotide and Flavin Mononucleotide: Vitamin B 2 1045 FAD and FMN are oxidizing agents. Mechanism ...

1046 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism In the first step of the flavin-catalyzed oxidation of an a ...

enzyme that uses an oxidizing coenzyme other than may still require to reoxidize the reduced coenzyme. For this reason, has been ...

1048 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism The coenzyme form of vitamin is thiamine pyrophosphate (TPP ...

Section 25.4 Thiamine Pyrophosphate: Vitamin B 1 1049 PROBLEM 7 Draw structures that show the similarity between decarboxylation ...

1050 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism capable of entering the citric acid cycle (Figure 25.3). Th ...

Section 25.4 Thiamine Pyrophosphate: Vitamin B 1 1051 tions than are carboxylic acids (Section 17.20). At physiological pH (7.3) ...

1052 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism Notice the similar function of TPP in all TPP-requiring enz ...

Section 25.5 Biotin: Vitamin H 1053 3-D Molecule: Biotin Biotin is the coenzyme required by enzymes that catalyze carboxylation ...

1054 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism All biotin-requiring enzymes follow the same three steps: a ...

Section 25.6 Pyridoxal Phosphate: Vitamin B 6 1055 In each of these transformations, one of the bonds to the of the amino acid s ...

1056 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism Once the amino acid has formed an imine with PLP, a bond to ...

Section 25.6 Pyridoxal Phosphate: Vitamin B 6 1057 In the first step of transamination, a proton is removed from the of the amin ...

1058 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism Without phenylalanine hydroxylase, the level of phenylala- ...

Section 25.6 Pyridoxal Phosphate: Vitamin B 6 1059 PROBLEM 12 Taking into account the pathway for phenylalanine degradation, an ...

1060 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism Compare the second step in a PLP-catalyzed transamination w ...