Obama's 5 Greatest Speeches Ever. As President Obama is set to give his first speech of the second term of his presidency here is a look at the five best speeches of Obamaâs political career up to this point. 1. âThe Audacity of Hope,â 2004 Democratic National Convention, Boston Massachusetts. How could any other speech take the top spot on the list?
Niacin is also involved in the synthesis of protein, fat, and pentoses needed for nucleic acid formation. Niacin is a major constituent of the coenzyme nicotinamide adenine dinucleotide (NAD) and nicotinamide adenine dinucleotide phosphate (NADP).These compounds function to remove hydrogen atoms during biological reactions.iacin is also involved in the synthesis of protein, fat, and pentoses needed for nucleic acid formation. Niacin is a major constituent of the coenzyme nicotinamide adenine dinucleotide (NAD) and nicotinamide adenine dinucleotide phosphate (NADP).
Vitamins, Cofactors and Coenzymes. Nonprotein components of certain enzymes are called cofactors. If the cofactor is organic, then it is called a coenzyme. Coenzymes are relatively small molecules compared to the protein part of the enzyme and many of the coenzymes are derived from vitamins. The coenzymes make up a part of the active site, since without the coenzyme, the enzyme will not function. 1  Flavin Adenine Dinucleotide (FAD) The structure shown on the left is for FAD and is similar to NAD+ in that it contains a vitamin-riboflavin, adenine, ribose, and phosphates.