The carbon-nitrogen peptide bond is rigid, but rotation can take place about the bond between the nitrogen and α-carbon atoms and the bond between the α-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. (degrees) 180 120 60 60 0 Which observation most likely describes part of an observed a helix? p=-59 degrees; = +150 degrees; many Ser residues cp-140 degrees; w = +130 degrees; many Val residues op-57 degrees; w = -47 degrees; many Pro residues op-60 degrees; y = -47 degrees; many Ala residues p = +60 degrees; y = +40 degrees; many Gly residues -60 -120 -180 -180 0 ➜ (degrees) 180
The carbon-nitrogen peptide bond is rigid, but rotation can take place about the bond between the nitrogen and α-carbon atoms and the bond between the α-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. (degrees) 180 120 60 60 0 Which observation most likely describes part of an observed a helix? p=-59 degrees; = +150 degrees; many Ser residues cp-140 degrees; w = +130 degrees; many Val residues op-57 degrees; w = -47 degrees; many Pro residues op-60 degrees; y = -47 degrees; many Ala residues p = +60 degrees; y = +40 degrees; many Gly residues -60 -120 -180 -180 0 ➜ (degrees) 180
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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Transcribed Image Text:The carbon-nitrogen peptide bond is rigid, but rotation can take place
about the bond between the nitrogen and α-carbon atoms and the bond
between the α-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.
(degrees)
180
120
60
60
0
Which observation most likely describes part of an observed a helix?
p=-59 degrees; = +150 degrees; many Ser residues
cp-140 degrees; w = +130 degrees; many Val residues
op-57 degrees; w = -47 degrees; many Pro residues
op-60 degrees; y = -47 degrees; many Ala residues
p = +60 degrees; y = +40 degrees; many Gly residues
-60
-120
-180
-180
0
➜ (degrees)
180
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