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- 16. Describe the basic principles behind the functioning of an amino acid analyzer. What is it? W- is it used for? How does it work (start to finish)? 17. In peptide, protein chemistry, what does the term 'sequence' mean? 18. About how many amino acid residues can be in a peptide in order to sequence it by Edman degradation?Consider the tetrasaccharide stachyose drawn below. Stachyose is found in white jasmine, soybeans, and lentils. Because humans cannot digest it, its consumption causes flatulence.a. Label all glycoside bonds.b. Classify each glycosidic linkage as α or β and use numbers to designate its location between two rings (e.g., 1→4-β).c. What products are formed when stachyose is hydrolyzed with H3O+?d. Is stachyose a reducing sugar?e. What product is formed when stachyose is treated with excess CH3I, Ag2O?f. What products are formed when the product in (e) is treated with H3O+?d) 1.EtMgBr PCC HO- CH2CI2 2. H20 A
- Consider the tetrasaccharide stachyose drawn below. Stachyose is found in white jasmine, soybeans, and lentils. Because humans cannot digest it, its consumption causes flatulence.a. Label all glycoside bonds.b. Classify each glycosidic linkage as αα or ββ and use numbers to designate its location between two rings (e.g., 1→→4-ββ)-c. What products are formed when stachyose is hydrolyzed with H33O++?d. Is stachyose a reducing sugar?e. What product is formed when stachyose is treated with excess CH33I, Ag22O?f. What products are formed when the product in (e) is treated with H33O++?U3acclanue. b. simple sugar. с. disaccharide. d. polysaccharide. e. oligosaccharide. 12. Which of the following glycosidic linkages does the sugar shown below contain? CH2OH CH2OH OH OH OH OH OH OH a. B-(2→4) b. a-(1→4) с. В-(1—4) d. a-(2-4) e. a-(2→6)Lit CH3I LDA) CH3I C12 Hcl /H2O LDA 2) Br
- Disulfide linkages: A. are covalent bonds. B. are a type of electrostatic interaction. C. occur between methionine residues. D. can be disrupted by SDS. E. can only occur within the same polypeptide chain.Can you please answer questions 37 and 38?7. Draw structure for the following compounds. D- fructose C. L-Mannose a - lactose g. B-D- ribose . نه نه ن a. e. i. Small section of amylopectin b. B-D- Galactose d. ß- maltose f. D-2-deoxyribose h. Small section of amylose j. Sucrose
- Select the six atoms, including the labelled (*) one, in the tetrapeptide below that lie in the same plane.. Identify the following antioxidant molecule. A. alpha tocopherol hydroquinone dehydroascorbic acid CH3 CH3 C. alpha tocopherol semi-quinone \ / D. ascorbic acid C = C E. alpha tocopherol quinone / \ : O – C C – O CH3 \\ // \ / C – C C – CH2–CH2–CH2–CH–CH2–CH2–CH2–CH–CH2–CH2–CH2–CH–CH3 / \ / l l l CH3 CH2– CH2 CH3 CH3 CH31. Consider the following molecules. Clearly circle the glycosidic bond on each structure. In the Spae provided clearly describe the type of glycosidic bond illustrated. HO-CH2 O. H. H. OH HO. HO-CH2 OH H. H. H. OH H. OH Но H. H. H. OH OH HOH2Ç HO OH OH CH2OH HI エー エエー