Two amino acids are shown below. Name them in the blanks, and then draw the structure of the dipeptide they would form if a peptide bond connected them (in the order shown.) Draw the dipeptide as a Zwitterion, and name it in the blank. ང་ནི་ཨ་ H3N- CH CH3 O + +H3N-CH2-C
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- 2. Two amino acids are shown below. Name them in the blanks, and then draw the structure of the dipeptide they would form if a peptide bond connected them (in the order shown.) Draw the dipeptide as a Zwitterion, and name it in the blank. H3N-CH- CH-C-O CH3 + + H3N-CH₂-C O7. Draw and give the full names of the amino acids in the following dipeptides. ČHS HN- OH CH, CH- OH CH2Shown 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).
- 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…Exercise A: Amino Acid Functional Groups Figure 1 below shows one of the 20 amino acids that make up proteins. Recall that carbon can form four covalent bonds. Amino acids consist of a central carbon, called the a-carbon, that is bonded to four different chemical groups. H + CH2 OH Figure 1. Structure of an amino acid Answer the below questions in your own document. • On the amino acid shown in Figure 1, label the a-carbon. • The a-carbon of each of the 20 amino acids is bonded to one hydrogen atom, one amino group, one carboxyl group, and one R group (more on that below). You should recognize the amino and carboxyl groups from our discussion of functional groups in organic molecules. Circle and label* the amino group and the carboxyl group in Figure 1. *Note: our goal in this question, and in similar questions throughout this lab, is for you to be able to identify specific structures. You can do this circling/labeling in whatever way is easiest for you. You might want to draw the…8) The figure shows an unfolded polypeptide consisting of six amino acids. Describe how cooperativity will drive protein folding of the polypeptide chain into an alpha-helixe- 10EEHOW is AG changed as each amino acid is incorporated into the secondary structure - s)? O H O H 3 H. H. 5 CH-C H. 6 -N-CH-C- OH O H,N CH-C -N CH C-N CH CH CH2 CH2 CH2 CH2 CH OH CH H;C CH3
- The structure of the dipeptide Gly-Asn is given by . The structures of the amino acids Gly and Asn are given below. NH2 H. ČH2 H3N-C-CO H. H3N-C-CO H. Asn Gly NH2 CH2 H H H2 C COO 2. H3N-C -C H. 1. H&N C C-NH C COO NH, NH2 CH2 H. H2 C C NH2 3. H3N-C C- -C COO 4. 0OC-C NH3" Click Save and Submit to save and submit. Click Save All Ansuwers to save all answers. MacBook Air esc 吕0 DII DD F1 F2 F3 F4 F5 F6 F7 F8 F9 @ 2$ & 1 2 4 5 7 8 Q W E R Y | A S D F G K C V N M < CO # 3 HICHA polypeptide is shown below. Please answer the following questions. OH В A H;N E a. Match the letter labels to the appropriate components of a polypeptide. carbonyl group [ Select ] amide [ Select ] alpha amino group [ Select ] alpha carboxylic group [ Select ] peptide bond [Select] b. How many peptide bonds are in this polypeptide? [ Select ] V Residues? [ Select ] c. If the second residue were replaced with glutamic acid would the pl increase or decrease? [ Select ] >Oligopeptide 1 Oligopeptide 2 N. N- H. N-H H Give the three-letter and one-letter names of the amino acids in each oligopeptide starting from the amino terminal to the carboxyl terminal. Make sure that the amino acid names are arranged in CORRECT order for both oligopeptides.
- 1. An oligosaccharide is a repeating unit of a-D-galactopyranosyl- (a-1- 3)-allopyranoside. Each of the disaccharide unit is linked via B-1-->4 glycosidic bond. Identify and draw the molecular structure. Identify and draw the structure. The oligosaccharide has 10 monosaccharide residue a. Upon the action of alpha-glycosidase, identify and draw all the possible products. b. What is the L-isomer of the Fisher projection of one epimer of D-allopyronoside. Draw the structure. Why is this an epimer of the monosaccharide? c. Is this saccharide a good substrate for glycolysis? Why or why not?29. Amino Acid Chemistry: Using the amino acid chart provided..Ala-Lys-Cys & give the isoelectric point for the tripeptide. Table 23.2 The pK, Values of Amino Acids pk, a-COOH a-NH3* Amino acid side chain Alanine 2.34 9.69 2.17 9.04 12.48 Arginine Asparagine 2.02 8.84 3.86 Aspartic acid Cysteine 2.09 9.82 1.92 10.46 8.35 Glutamic acid 2.19 9.67 4.25 Glutamine 2.17 9.13 Glycine 2.34 9.60 1.82 9.17 6.04 Histidine 2.36 9.68 Isoleucine Leucine 2.36 9.60 2.18 $ 95 10.79 Lysine 2.28 9.21 Methionine 16 9.18 Phenylalanine 1.99 10.60 Proline 2.21 9.15 Serine 2.63 9.10 Threonine 2.38 9.39 Tryptophan Tyrosine 9.11 10.07 2.20 2.32 9.62 Valine O something else! 5.14 O 8.65 something else! 5.81 9.02 9.57Circle the functional groups on the R-group of the AMINO ACIDS below that are capable of forming hydrogen bonds. How do you know? 1 O H₂N-CH-C-O H 6 H₂N-CH-C-O CH H₂ CH₂ H₂C 2 요 H₂N-CH-C-O CH, 7 ar 3 hods word no 4hom on oq H₂N-CH-8-0-H₂N-CH-8-0 H₂N-CH-8-0- CH₂ CH₂ H₂C 201 8 CH₂ CH CH CH₂ sizoda H₂C CH₂ 10. Birds 9 H₂N-CH-8-0 H₂N-CH-8-0- CH₂ OH CH H₂C OH 578 aloriool H₂N-CH-C-O CH₂ CH₂ 0=C o 5 0=c NH₂ 요 H₂N-CH-C-O CH₂ CH₂ CH₂ CH ₂ 10 H₂N © University of California, Davis