Concept explainers
(a)
Interpretation: The net charge on valine in a low-
Concept introduction: In the solid state and also in solution,
(b)
Interpretation: The net charge on lysine in a low-
Concept introduction: In the solid state and also in solution,
(c)
Interpretation: The net charge on aspartic acid in a low-
Concept introduction: In the solid state and also in solution,
(d)
Interpretation: The net charge on serine in a low-
Concept introduction: In the solid state and also in solution,
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Organic And Biological Chemistry
- In a high-pH aqueous solution, indicate whether each of the following amino acids has (1) a net positive charge of 2+, (2) a net positive charge of 1+, (3) a net charge of zero, (4) a net negative charge of 1, or (5) a net negative charge of 2. a. Arginine b. Glutamic acid c. Glutamine d. Alaninearrow_forwardConsider the tripeptide tyrosylleucylisoleucine. a. Specify its structure using three-letter symbols for the amino acids. b. How many peptide bonds are present within the peptide? c. Which of the amino acid residues has the largest R group? d. Which of the amino acid residues, if any, has an acidic side chain?arrow_forwardWhat characteristics indicate that amino acids exist as zwitterions?arrow_forward
- In a pleated sheet secondary structure for a protein a. describe the general shape of the protein backbone b. describe the general locations for the amino acid R groupsarrow_forwardConsider the tripeptide leucylvalyltryptophan. a. Specify its structure using three-letter symbols for the amino acids. b. How many peptide bonds are present within the peptide? c. Which of the amino acid residues has the largest R group? d. Which of the amino acid residues, if any, has a basic side chain?arrow_forwardTwo proteins with the same amino acid composition do not have to have the same primary structure. Explain why.arrow_forward
- 22-21 Explain why an amino acid cannot exist in an un-ionized form at any pH.arrow_forwardWhat types of interactions can occur between the side chains of the following amino acids that would help maintain the tertiary structure of a protein? a. cysteine and cysteine b. glutamine and serine c. glutamic acid and lysine d. proline and leucinearrow_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_forward
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