II. Draw the different forms of the following amino acids in solution. 1. Proline (3 forms) 2. Glutamic acid (4 forms) 3. Lysine (4 forms)
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- 6. b. Draw a box around the disulfide bridge in oxytocin, if present, or write "none". 7. Mark each peptide bond in oxytocin by making the corresponding line in the structure thicker or marking it with a different color. The first one is shown for you as an example (in dark orange). 8. Number the central carbon of each amino acid in oxytocin by pointing a small arrow to it or by circling the corresponding vertex in the image. Numbers 1 and 2 indicate the central carbons of the first and second amino acids of oxytocin, and are shown for you as an example. 9. Fill out the following table, listing amino acids that make up oxytocin in order, from the N terminus to the C terminus, characterizing each amino acid by the properties of its R group (side chains), and briefly indicating the reasoning for the characterization. You may consult amino acid groupings by category in the slides (or the textbook, p.49), but you must explain the reasoning for each in your own words. CO 1 AA# Abbre- Full…I. Apply your knowledge on the basic structure of amino acids by creating a polypeptide chain that is 4 amino acids long showing its structural formula, II. Why are R groups important in amino acids?1. Draw NEW amino acids; name them and characterize them, following the rules and properties of the 20 existing, essential amino acids 2. Make two dipeptides with your two new amino acids. Name the two dipeptides. Indicate the peptide bond.
- Shown below are three amino acids: H,N-CH-C-o ҫн, H,N-CH-C-o CH, H,N-CH-C-o ČH, Tyrosine Tyr Y Phenylalanine Phe F Alanine Ala A 1. Which amino acid is the least hydrophobic? 2. Which amino acid is most hydrophobic? 3. Which amino acid is intermediate? 4. Explain why (2) is more hydrophobic than (3). 5. Explain why (3) is more hydrophobic than (1).Which of the following statements about amino acids is/are incorrect? 1. Standard amino acids are so named because these are the only amino acids there are. 2. Essential amino acids can be synthesized by the organism. 3. All standard amino acids are optically active. 4. Overall, naturally occurring amino acids are equally likely to be found having either an R or S configuration around the alpha carbon. O 1, 3, and 4 O 1, 2, 3, and 4 1 and 2 O 1, 2, and 33. The general properties of amino acids: a) formation of zwitterion; b) the acid-base properties (the amphoteric nature).
- 1. a. Explain why the melting point of palmitic acid (16 carbons, no double bonds) is slightly lower thanthat of stearic acid (18 carbons, no double bonds). Explain why the melting point of oleic acid (18carbons, one double bond) is lower than that of stearic acid b. A mixture of lipids containing phosphatidic acid, cholesterol, testosterone, phosphatidylserine, andphosphatidylethanolamine was applied to a hydrophobic interaction chromatography column. Thecolumn was washed with a high salt buffer, and the lipids were then eluted with decreasing saltconcentrations. In what order would the lipids be eluted from the column? Explain your answer.Write down the abbreviations (both 1 letter and 3 letter) for the amino acids given below:Tryptophan, Glutamine, Isoleucine, Cysteine, ArgininePlease clearly identify each numbered amino acid side chain, below. Your description should include the name or 3 letter code for the amino acid and the type (i.e., chemical class) of the amino acid. 1 4 OH OH CH, CH, CH2 CH2 CH, "H,N-C-C-0 "H,N-C-C-0 "H,N-C-C-0 _0-5-5-N H. H O H O HO но
- 1. Where’s Elvis? Translate the following amino acid sequence into one – letter code: Glu – Leu – Val – Ile –Ser – Ile – Ser – Leu – Ile – Val – Ile – Asn – Gly – Ile – Asn – Leu – Ala – Ser – Val – Glu – Gly – Ala – Ser.___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___16. Name the type of biomolecules shown below:Which of the following amino acids can interact via ionic/electrostatic interactions with lysine at physiologic pH 7.4?a. Histidineb. Asparaginec. Glutamate