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Concept explainers
a.
To identify:
The N and C terminus of the given peptides. Phe-Glu.
Introduction:
The condensation reaction between the N-terminal of one amino acid and carboxylic group of another amino acid leads to the formation of a peptide bond. According to the convention, N-terminal of amino acid in a peptide bond is written on the left hand side while the C-terminal of amino acids is written on the right hand side.
The N-terminus represents the starting of the polypeptide which refers the free amino group and the C-terminus represents the end of the polypeptide which refers the free carboxyl group.
b.
To identify:
The N and C terminus of the given peptides KCG.
Introduction:
The condensation reaction between the N-terminal of one amino acid and carboxylic group of another amino acid leads to the formation of a peptide bond. According to the convention, N-terminal of amino acid in a peptide bond is written on the left hand side while the C-terminal of amino acids is written on the right hand side.
The N-terminus represents the starting of the polypeptide which refers the free amino group and the C-terminus represents the end of the polypeptide which refers the free carboxyl group.
c.
To identify:
The structural formula for the given peptide His-Met-Gln.
Introduction:
The condensation reaction between the N-terminal of one amino acid and carboxylic group of another amino acid leads to the formation of a peptide bond. According to the convention, N-terminal of amino acid in a peptide bond is written on the left hand side while the C-terminal of amino acids is written on the right hand side.
The N-terminus represents the starting of the polypeptide which refers the free amino group and the C-terminus represents the end of the polypeptide which refers the free carboxyl group.
d.
To determine:
The structural formula for the given peptide WY.
Introduction:
The condensation reaction between the N-terminal of one amino acid and carboxylic group of another amino acid leads to the formation of a peptide bond. According to the convention, N-terminal of amino acid in a peptide bond is written on the left hand side while the C-terminal of amino acids is written on the right hand side.
The N-terminus represents the starting of the polypeptide which refers the free amino group and the C-terminus represents the end of the polypeptide which refers the free carboxyl group.
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Chapter 10 Solutions
EBK LABORATORY MANUAL FOR GENERAL, ORGA
- 22-42 (a) How many atoms of the peptide bond lie in the same plane? (b) Which atoms are they?arrow_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_forwardWhich amino acids could be referred to as derivatives of butanoic acid?arrow_forward
- Using both three- and one-letter codes for amino acids, write the structures of all possible peptides containing the following amino acids: (a) Val, Ser, Leu (b) Ser, Leu2, Proarrow_forwardWrite a generalized structural representation for a peptide bond.arrow_forwardHow many of the -amino acids shown in Table 26-1 contain aromatic rings? How many contain sulfur? How many contain alcohols? How many contain hydrocarbon side chains?arrow_forward
- Identify the R group of the side chain in the following amino acids that results in the side-chain classification indicated in parentheses see Table 19.1: a. tyrosine neutral, polar b. glutamate acidic, polar c. methionine neutral, nonpolar d. histidine basic, polar e. cysteine neutral, polar f. valine neutral, nonpolararrow_forwardDrawing Peptide Structures Draw the tripeptide that would result from cysteine attaching to the previous dipeptide on the acidic side.arrow_forwardAnswer the following questions about the amino acid whose Fischer projection formula is a. Is it a D-amino acid or an L-amino acid? b. Is it a nonpolar or polar amino acid? c. Is it an essential or nonessential amino acid? d. Is it a standard or nonstandard amino acid?arrow_forward
- Which of the statements concerning the peptide shown below is FALSE? H2 H3N-C C-N-C- H -O- H2C CH2 CH₂OH H2 Its primary structure is Gly-Pro-Ser. It is a tripeptide. There are two peptide bonds. The peptide contains only hydrophobic amino acid residues.arrow_forwardDraw the structure of the pentapeptide Met-Pro-Ser-His-Ile at its plarrow_forwardGive the complete name of the peptide below.arrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,World of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage Learning
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning
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