Organic Chemistry

Section 25.7 Coenzyme B 12 :Vitamin B 12 1061 PROBLEM 15 Which of the following compounds is more easily decarboxylated? PROBLEM ...

1062 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism Animals and plants cannot synthesize vitamin In fact, only ...

Section 25.7 Coenzyme B 12 :Vitamin B 12 1063 In each of these coenzyme –requiring reactions, a group (Y) bonded to one carbon c ...

1064 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism PROBLEM 18 Ethanolamine ammonia lyase, a coenzyme –requirin ...

Section 25.8 Tetrahydrofolate: Folic Acid 1065 3-D Molecule: Tetrahydrofolate (THF) Homocysteine methyl transferase and glycinam ...

1066 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism Tutorial: Mechanism for catalysis by thymidylate synthase N ...

Section 25.8 Tetrahydrofolate: Folic Acid 1067 A common anticancer drug that inhibits thymidylate synthase is 5-fluorouracil. 5- ...

PROBLEM 20 What is the source of the methyl group in thymidine? 25.9 Vitamin Vitamin K Vitamin K is required for proper clottin ...

Section 25.9 Vitamin KH 2 :Vitamin K 1069 Vitamin is required by the enzyme that catalyzes the carboxylation of the of a glutama ...

PROBLEM 21 Thiols such as ethanethiol and propanethiol can be used to reduce vitamin K epoxide back to vitamin KH 2 ,but they re ...

Problems 1071 Summary Cofactorsassist enzymes in catalyzing a variety of reac- tions that cannot be catalyzed solely by their am ...

1072 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism c. What three one-carbon groups are various tetrahydrofolat ...

Problems 1073 Give the products of the following reaction, where T is tritium: (Hint:Tritium is a hydrogen atom with two neutr ...

1074 CHAPTER 25 The Organic Mechanisms of the Coenzymes • Metabolism The glycine cleavage system is a group of four enzymes tha ...

The solubility of lipids in nonpolar organic solvents results from their significant hydrocarbon component. The hydrocarbon port ...

002 CHAPTER 26 Lipids Melting Number point of carbons Common name Systematic name Structure °C Saturated lauric acid dodecanoic ...

Section 26.1 Fatty Acids 003 OMEGA FATTY ACIDS Omegais a term used to indicate the position of the first double bond—from the me ...

26.2 Waxes Waxesare esters formed from long-chain carboxylic acids and long-chain alcohols. For example, beeswax, the structural ...

Section 26.3 Fats and Oils 005 Triacylglycerols that are solids or semisolids at room temperature are called fats. Fats are usua ...

PROBLEM 3 Do all triacylglycerols have the same number of asymmetric carbons? PROBLEM 4 Which has a higher melting point, glycer ...