Answer
Why did the investigators choose amino acids at positions 1, 12, 17, and 18 for modification?
1.) Why is it that amino acids in proteins are called a-amino acids? 2.) explain alpha, amino, and acid . Please answer questions 1&2 !
1. There are a total of amino acids are called natural amino acids that are found in proteins. These according to the older Greek letter nomenclature system for designating carboxylic acid structures. 2. True/ False The alpha carbon is the carbonyl carbon of the carboxylic acid functional group of the amino acid. 3. Which of the following are functional groups in an amino acid? (choose all that apply) a. amine b. amide c. carbonyl d. carboxylic acid e. alcohol f....
1. Amino acids are often broken down into two groups, essential and nonessential. Essential amino acids must be eaten in order to survive as we don’t make them. This is why intaking a certain amount of protein is so important to the body. In one of the greatest scientific finds of the 21st century, amino acids were discovered inside meteorites that had impacted the earth. Interestly, the amino acids contained different side chains and configurations than those found on earth....
Consider the following amino acids for questions 11-13. Choose the best answers. cysteine serine lysine phenylalanine aspartate Which amino acid's R group has a pKa nearest physiological pH? Which amino acid would you most expect to find in the centre of a folded globular protein? Which amino amino acid can be phosphorylated? The overall charge on the peptide (G-R-A-M-P-S) at pH 12.5 is: -1 -0.5 -1.5 +0.5 1 15. What term best describes the protein secondary structure element drawn below:...
17. Which of these amino acids has a thiol group as part of its side chain? a. cysteine tyrosine Aca histidine threonine e: alanine 18. Which structure correctly represents an amino acid zwitterion? C- OH. NH R CH C- OH NH, NH R- CHHC OH NH NH
"R" group polarity nonpolar, polar, or polar with H-
bonds.
1. choose any two know amino acids with similar Rf and based on the
size and polarity of their side chains, give an explanation for why
their retention factors are similar.
2. choose any two known amino acids with very different Rf values
and based on the size and polarity of their side chains, give an
explanation for why their retention factors are dissimilar.
3. Explain why lysines Rf is...
1. Name the principal catabolites of the carbon skeletons of the protein amino acids and the major metabolic fates of these catabolites. 2. Outline the metabolic pathways for tyrosine, phenylalanine, methionine, cysteine and branched chain amino acids, and identify reactions associated with clinically significant metabolic disorders. 3. Explain why metabolic defects in different enzymes of the catabolism of a specific amino acids tyrosine, phenylalanine, methionine, cysteine and branched chain amino acids) can be associated with similar clinical signs and symptoms....
Choose three amino acids, no more than one of each of the following types: a. polar side group b. non-polar side group c. acidic side group d. basic side group Draw an unambiguous structure for each of the amino acids you chose, in the full propionate form (at pH=0). That is, all oxygen/sulfur sites should be neutral, and appropriate amino sites should have a+1 charge. For full credit, show all stereochemistry properly. a. b. c. CIRCLE the side groups for...
Carboxylic Acids 17-1. Write the names and structures of acetic acid and and wolbenzoic acid Esters Amines 18-1. Write the names and structures of ammonia and aniline ven Glucose 20-1. Discuss general characteristics of these And Other common monosaccharides: Mono- glucose, fructose, galactose saccharides (Chapter 20) 20-4. Identify the following as disaccharides: sucrose, Disaccharides and maltose, lactose Polysaccharides 20-5 Identify the following as polysaccharides: starch, glycogen, cellulose 19-1. Discuss the physical Fatty Acids properties of lipids (Chapter 19) 19-2. Distinguish...
14) Which of the following amino acids will by cation-exchange chromatography? following amino acids will be retained longest in the column when sepa Η serne HO-CH-C-COO v. Lysine H3N-CH2CH2CH2CH2CH-co NES NH V. Phenylalanine CH-C–COOH II. Alanine CH3-C-Coo II. Cysteine HS-CH-c-coo® NE 15) What is the product obtained from mild oxidation of the thiol shown below? mild 2R-SH oxidation A) R-S- R B) R-OH C) R-S-S-R DR-OO- RE ) R-S-OH 16) Which bond in the following compound is a peptide bond?...