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The carbon-nitrogen peptide bond is rigid, but rotation can take place about the bond between the nitrogen and a-carbon atoms and the bond between the a-carbon and the carbonyl carbon atom. These bond angles define the conformation of the peptide chain. Consider the Ramachandran plot shown to answer both questions. fr (degrees) 180 120 8280 60 ° -60 Which observation most likely describes part of an observed a helix? p=-59 degrees; y = +150 degrees; many Ser residues qp=-140 degrees; w +130 degrees; many Val residues qp=-57 degrees; y = -47 degrees; many Pro residues qp=-60 degrees; y = -47 degrees; many Ala residues p = +60 degrees; y = +40 degrees; many Gly residues Which observations would not likely occur in a ẞ sheet? qp=-59 degrees; y = -49 degrees; many Ala residues qp = +60 degrees; w = +60 degrees; many Gly residues qp=-120 degrees; y = +120 degrees; many Tyr residues ☐ ☐ qp=-139 degrees; y = +135 degrees; many Val residues op=-51 degrees; w+153 degrees; many Gly and Pro residues -120 -180 -180 0 180 (degrees)

The carbon-nitrogen peptide bond is rigid, but rotation can take place about the bond between the nitrogen and a-carbon atoms and the bond between the a-carbon and the carbonyl carbon atom. These bond angles define the conformation of the peptide chain. Consider the Ramachandran plot shown to answer both questions. fr (degrees) 180 120 8280 60 ° -60 Which observation most likely describes part of an observed a helix? p=-59 degrees; y = +150 degrees; many Ser residues qp=-140 degrees; w +130 degrees; many Val residues qp=-57 degrees; y = -47 degrees; many Pro residues qp=-60 degrees; y = -47 degrees; many Ala residues p = +60 degrees; y = +40 degrees; many Gly residues Which observations would not likely occur in a ẞ sheet? qp=-59 degrees; y = -49 degrees; many Ala residues qp = +60 degrees; w = +60 degrees; many Gly residues qp=-120 degrees; y = +120 degrees; many Tyr residues ☐ ☐ qp=-139 degrees; y = +135 degrees; many Val residues op=-51 degrees; w+153 degrees; many Gly and Pro residues -120 -180 -180 0 180 (degrees)

Human Heredity: Principles and Issues (MindTap Course List)
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter9: Gene Expression And Gene Regulation
Section: Chapter Questions
Problem 19QP: Below is the structure of glycine. Draw a tripeptide composed exclusively of glycine. Label the...
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The carbon-nitrogen peptide bond is rigid, but rotation can take place about the bond between the nitrogen and a-carbon atoms and the bond between the a-carbon and the carbonyl carbon atom. These bond angles define the conformation of the peptide chain. Consider the Ramachandran plot shown to answer both questions. fr (degrees) 180 120 8280 60 ° -60 Which observation most likely describes part of an observed a helix? p=-59 degrees; y = +150 degrees; many Ser residues qp=-140 degrees; w +130 degrees; many Val residues qp=-57 degrees; y = -47 degrees; many Pro residues qp=-60 degrees; y = -47 degrees; many Ala residues p = +60 degrees; y = +40 degrees; many Gly residues Which observations would not likely occur in a ẞ sheet? qp=-59 degrees; y = -49 degrees; many Ala residues qp = +60 degrees; w = +60 degrees; many Gly residues qp=-120 degrees; y = +120 degrees; many Tyr residues ☐ ☐ qp=-139 degrees; y = +135 degrees; many Val residues op=-51 degrees; w+153 degrees; many Gly and Pro residues -120 -180 -180 0 180 (degrees)
Transcribed Image Text:The carbon-nitrogen peptide bond is rigid, but rotation can take place about the bond between the nitrogen and a-carbon atoms and the bond between the a-carbon and the carbonyl carbon atom. These bond angles define the conformation of the peptide chain. Consider the Ramachandran plot shown to answer both questions. fr (degrees) 180 120 8280 60 ° -60 Which observation most likely describes part of an observed a helix? p=-59 degrees; y = +150 degrees; many Ser residues qp=-140 degrees; w +130 degrees; many Val residues qp=-57 degrees; y = -47 degrees; many Pro residues qp=-60 degrees; y = -47 degrees; many Ala residues p = +60 degrees; y = +40 degrees; many Gly residues Which observations would not likely occur in a ẞ sheet? qp=-59 degrees; y = -49 degrees; many Ala residues qp = +60 degrees; w = +60 degrees; many Gly residues qp=-120 degrees; y = +120 degrees; many Tyr residues ☐ ☐ qp=-139 degrees; y = +135 degrees; many Val residues op=-51 degrees; w+153 degrees; many Gly and Pro residues -120 -180 -180 0 180 (degrees)
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