Loose Leaf for General, Organic and Biological Chemistry with Connect 2 Year Access Card
4th Edition
ISBN: 9781260269284
Author: Janice Gorzynski Smith Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 21.4, Problem 21.3PP
Identify the N-terminal and C-terminal amino acid in each peptide.
b. Arg-His-Asn-Tyr
d. Val-Thr-Pro-Phe
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C. AMINO ACIDS AND PEPTIDES
Consider the structure of the peptide, Asn-Gln-Gly-Ala.
H₂N.
OH
Asn-Gln-Gly-Ala
NH₂
1. How many peptide bonds are present?
2. What is the N-terminal amino acid? Provide the three-letter name.
3. What is the C-terminal amino acid? Provide the three-letter name.
H₂N,
+ H₂N-
Protein
CPMV
N
For each tripeptide: [1] identify the amino acids that form the peptide; [2] label the N- and C-terminal amino acids; [3] name the tripeptide using three-letter symbols.
Chapter 21 Solutions
Loose Leaf for General, Organic and Biological Chemistry with Connect 2 Year Access Card
Ch. 21.2 - In addition to the amino and carboxyl groups, what...Ch. 21.2 - Draw both enantiomers of each amino acid in...Ch. 21.2 - Which of the following amino acids is naturally...Ch. 21.3 - Draw the structure of the amino acid valine at...Ch. 21.3 - Identify the amino acid shown with all uncharged...Ch. 21.4 - Identify the N-terminal and C-terminal amino acid...Ch. 21.4 - Prob. 21.4PCh. 21.4 - Prob. 21.4PPCh. 21.4 - Prob. 21.5PCh. 21.4 - Prob. 21.5PP
Ch. 21.4 - Prob. 21.6PPCh. 21.5 - Prob. 21.6PCh. 21.6 - Prob. 21.7PCh. 21.6 - Prob. 21.8PCh. 21.6 - Prob. 21.9PCh. 21.7 - Why is hemoglobin more water soluble than ...Ch. 21.8 - Prob. 21.7PPCh. 21.8 - Prob. 21.11PCh. 21.9 - Prob. 21.8PPCh. 21.9 - Prob. 21.12PCh. 21.9 - Prob. 21.9PPCh. 21.9 - Prob. 21.13PCh. 21.10 - Prob. 21.14PCh. 21.10 - Prob. 21.15PCh. 21.10 - Prob. 21.16PCh. 21.10 - Prob. 21.17PCh. 21.10 - The nerve gas sarin acts as a poison by covalently...Ch. 21.10 - Prob. 21.19PCh. 21.10 - Explain why the proteins involved in blood...Ch. 21 - The amino acid alanine is a solid at room...Ch. 21 - Why is phenylalanine water soluble but...Ch. 21 - Draw the structure of a naturally occurring amino...Ch. 21 - Draw the structure of a naturally occurring amino...Ch. 21 - For each amino acid: [1] draw the L enantiomer in...Ch. 21 - For each amino acid: [1] draw the L enantiomer in...Ch. 21 - Draw both enantiomers of each amino acid and label...Ch. 21 - Which of the following Fischer projections...Ch. 21 - For each amino acid: [1] give the name; [2] give...Ch. 21 - For each amino acid: [1] give the name; [2] give...Ch. 21 - (a) Identify the amino acid shown with all...Ch. 21 - Prob. 32PCh. 21 - Prob. 33PCh. 21 - Draw the structure of the neutral, positively...Ch. 21 - Locate the peptide bond in the dipeptide shown in...Ch. 21 - Label the N-terminal and C-terminal amino acids in...Ch. 21 - Melittin, the principal toxin of bee venom,...Ch. 21 - Cobratoxin is a neurotoxin found in the venom of...Ch. 21 - (a) Draw the structure of the two possible...Ch. 21 - (a) Draw the structure of the two possible...Ch. 21 - For each tripeptide: [1] draw the structure of the...Ch. 21 - For each tripeptide: [1] draw the structure of the...Ch. 21 - Prob. 43PCh. 21 - For each tripeptide: [1] identify the amino acids...Ch. 21 - What amino acids are formed by hydrolysis of the...Ch. 21 - Prob. 46PCh. 21 - Prob. 47PCh. 21 - Draw the structures of the amino acids formed when...Ch. 21 - Prob. 49PCh. 21 - Prob. 50PCh. 21 - Prob. 51PCh. 21 - Trypsin is a digestive enzyme that hydrolyzes...Ch. 21 - What type of intermolecular forces exist between...Ch. 21 - What type of interaction occur at each of the...Ch. 21 - Which peptide in each pair contains amino acids...Ch. 21 - Decide if the side chains of the amino acid...Ch. 21 - Which type of protein structure is indicated in...Ch. 21 - Label each of the following diagrams as...Ch. 21 - Prob. 59PCh. 21 - Prob. 60PCh. 21 - Prob. 61PCh. 21 - Prob. 62PCh. 21 - Compare - keratin and hemoglobin with regard to...Ch. 21 - Compare collagen and myoglobin with regard to each...Ch. 21 - Prob. 65PCh. 21 - Prob. 66PCh. 21 - Describe the function or biological activity of...Ch. 21 - Describe the function or biological activity of...Ch. 21 - Prob. 69PCh. 21 - Prob. 70PCh. 21 - What class of enzyme catalyzes each of the...Ch. 21 - What class of enzyme catalyzes each of the...Ch. 21 - Prob. 73PCh. 21 - Prob. 74PCh. 21 - Prob. 75PCh. 21 - What kind of reaction is catalyzed by each of the...Ch. 21 - Prob. 77PCh. 21 - How will each of the following changes affect the...Ch. 21 - Prob. 79PCh. 21 - Prob. 80PCh. 21 - Prob. 81PCh. 21 - Prob. 82PCh. 21 - Prob. 83PCh. 21 - Prob. 84PCh. 21 - Prob. 85PCh. 21 - Prob. 86PCh. 21 - Why must vegetarian diets be carefully balanced?Ch. 21 - Prob. 88PCh. 21 - Sometimes an incision is cauterized (burned) to...Ch. 21 - Why is insulin administered by injection instead...Ch. 21 - Prob. 91PCh. 21 - The silk produced by a silkworm is a protein with...Ch. 21 - Explain the difference in the mechanism of action...Ch. 21 - Prob. 94PCh. 21 - Prob. 95CPCh. 21 - Suggest a reason for the following observation....
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- 22-16 Which amino acids in Table 22-1 have more than one stereocenter?arrow_forwardFor the tripeptide SerValMet a. What amino acid is located at the peptides N-terminal end? b. What amino acid is located at the peptides C-terminal end? c. How many peptide bonds are present? d. How many amide linkages are present?arrow_forward22-30 (a) Use the three-letter abbreviations to write a representation of the following tripeptide: (b) Which amino acid is at the C-terminal end, and which is at the N-terminal end?arrow_forward
- 22-28 A tetrapeptide is abbreviated as DPKH. Which amino acid is at the N-terminus, and which is at the C-terminus?arrow_forward22-21 Explain why an amino acid cannot exist in an un-ionized form at any pH.arrow_forward22-35 Why is histidine considered a basic amino acid when the pKa of its side chain is 6.0?arrow_forward
- 22-44 How can a protein act as a buffer?arrow_forward22-10 Classify the following amino acids as nonpolar, polar but neutral, acidic, or basic. (a) Arginine (b) Leucine (c) Glutamic acid (d) Asparagine (e) Tyrosine (f) Phenylalamne (g) Glycinearrow_forward22-48 How many amino acid residues in the A chain of insulin are the same in insulin from humans, cattle (bovine), hogs, and sheep?arrow_forward
- 22-64 If both cysteine residues on the B chain of insulin were changed to alanine residues, how would it affect the quaternary structure of insulin?arrow_forwardComplete degradation of a protein into individual amino acids involves choose all that are correct: a. Removal of a water molecule from between two amino acids b. Addition of a water molecule between two amino acids c. A hydrolysis reaction d. The breaking of peptide linkagearrow_forwardDrawing Peptide Structures Draw the tripeptide that would result from cysteine attaching to the previous dipeptide on the acidic side.arrow_forward
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