Textbook QuestionWhat kind of bond would you expect between the side chains of the following amino acids?c. Aspartic acid and asparagine190views
Textbook QuestionWhat kind of bond would you expect between the side chains of the following amino acids?b. Alanine and leucine180views
Textbook QuestionIs the bond formed between each pair in Problem 18.76 covalent or noncovalent?166views
Textbook QuestionFor each amino acid listed, tell whether its influence on tertiary structure is largely through hydrophobic interactions, hydrogen bonding, formation of salt bridges, covalent bonding, or some combination of these effects.a. Tyrosine183views
Multiple ChoiceWhat type of R group interaction is the most likely between the alanine and isoleucine residues? 143views
Textbook QuestionOxytocin is a small peptide that is used to induce labor by causing contractions in uterine walls. It has the primary structure Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gln. This peptide is held in a cyclic configuration by a disulfide bridge. Draw a diagram of oxytocin, showing the disulfide bridge.226views
Textbook QuestionHow do the following noncovalent interactions help to stabilize the tertiary and quaternary structure of a protein? Give an example of a pair of amino acids that could give rise to each interaction.a. Hydrophobic interactions178views
Multiple ChoiceWhich of the following amino acid pairs are the most likely to form hydrogen bonds? 171views
Textbook QuestionBoth α-keratin and tropocollagen have helical secondary structure. How do these molecules differ in (a) amino acid composition and (b) three-dimensional structure?180views
Textbook QuestionIdentify the amino acids and type of interaction that occurs between the following R groups in tertiary protein structures: (16.1, 16.3)a. <IMAGE>67views
Textbook QuestionIdentify the amino acids and type of interaction that occurs between the following R groups in tertiary protein structures: (16.1, 16.3)c. —CH₂—SH and HS—CH₂—49views
Textbook QuestionWhat type of interaction would you expect between the following in a tertiary structure? (16.1, 16.3)a. threonine and glutamine125views
Textbook Question If glutamate were replaced by proline in a protein, how might the tertiary structure be affected? (16.1, 16.3)82views
Textbook QuestionConsider the amino acids histidine, phenylalanine, and serine in an enzyme. State which of these amino acids have R groups that would: (16.1, 16.3)d. form salt bridges41views
Textbook QuestionWhat type of interaction would you expect between the R groups of the following amino acids in a tertiary structure?c. serine and aspartate79views
Textbook QuestionIn myoglobin, about one-half of the 153 amino acids have nonpolar R groups.a. Where would you expect those amino acids to be located in the tertiary structure?44views
Textbook QuestionIn myoglobin, about one-half of the 153 amino acids have nonpolar R groups.b. Where would you expect the polar R groups to be in the tertiary structure?50views
Textbook QuestionWhen a protein folds into its tertiary structure, does the primary structure change? Explain.76views
Textbook QuestionWhat type of interaction would you expect between the side chains of each of the following pairs of amino acids in the tertiary structure of a protein?b. alanine and valine65views
Textbook Question"What type of interaction would you expect between the side chains of each of the following pairs of amino acids in the tertiary structure of a protein?a. lysine and glutamate"105views
Textbook QuestionWhat type of interaction would you expect between the side chains of each of the following pairs of amino acids in the tertiary structure of a protein?b. leucine and isoleucine77views
Textbook QuestionWhat type of interaction would you expect between the side chains of each of the following pairs of amino acids in the tertiary structure of a protein?d. glutamine and arginine84views
Textbook QuestionMyoglobin is a protein containing 153 amino acids. Approximately half of the amino acids in myoglobin have polar side chains.a. Where would you expect these amino acid side chains to be located in the tertiary structure of the protein?25views
Textbook QuestionMyoglobin is a protein containing 153 amino acids. Approximately half of the amino acids in myoglobin have polar side chains.b. Where would you expect the nonpolar side chains to be?28views
Textbook Questionb. Would you expect to find this segment at the center or on the surface of a globular protein? Why?52views
Textbook QuestionName the covalent bond that helps to stabilize the tertiary structure of a protein.62views
Textbook QuestionCollagen contains an amino acid that is a modified form of the naturally occurring amino acid.a. Name the natural amino acid.45views