Poly-L-leucine in an organic solvent such as dioxane is a helical, whereas poly-L-isoleucine is not.Why do these amino acids with the same number and kinds of atoms have different helix-forming tendencies?L-isoleucine's methyl group sterically interferes with α-helix formation, whereas L-leucine's methyl group doesnot interfere.L-isoleucine lacks an NH group that can donate a hydrogen bond to stabilize an a helix, whereas L-leucine has anNH group.L-isoleucine contains a hydrogen-bond acceptor in close proximity to the main chain, whereas L-leucine lacksthis group.L-isoleucine's ring structure prevents it from assuming the op value to fit into an a helix, whereas L-isoleucine doesnot have a ring structure.

Both L-leucine and L-isoleucine are similar types of molecules called amino acids, which are the…

Answered: Poly-L-leucine in an organic solvent…

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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Similar questions

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
Below is the structure of glycine. Draw a tripeptide composed exclusively of glycine. Label the N-terminus and C-terminus. Draw a box around the peptide bonds.
a. Can a mutation change a proteins tertiary structure without changing its primary structure? b. Can a mutation change a proteins primary structure without affecting its secondary structure?
List the pyrimidine bases, the purine bases, and the base-pairing rules for DNA.
A beginning genetics student is attempting to complete an assignment to draw a base pair from a DNA molecule. The drawing is incomplete, and the student does not know how to finish. He asks for your advice. The assignment sheet shows that the drawing is to contain three hydrogen bonds, a purine, and a pyrimidine. From your knowledge of the pairing rules and the number of hydrogen bonds in A/T and G/C base pairs, what base pair do you help the student draw?
Which of the following levels of protein structure may be affected by hydrogen bonding? (a) primary and secondary (b) primary and tertiary (c) secondary, tertiary, and quaternary (d) primary, secondary, and tertiary (e) primary, secondary, tertiary, and quaternary
RNA is ribonucleic acid, and DNA is deoxyribonucleic acid. What exactly is deoxygenated about DNA?
How many kilobases of the DNA strand below will code for the protein product?
Amino acids have the generic structure seen below, where R represents different carbon-based side chains. Describe how the structure of amino acids allows them to be linked into long peptide chains to form proteins.
The synthetic process by which monomers are covalently linked is (a) hydrolysis (b) isomerization (c) condensation (d) glycosidic linkage (e) ester linkage
Which of the following is a functional group that is part of a building block of proteins? phosphate adenine amino ribose
State the properties of the WatsonCrick model of DNA in the following categories: a. number of polynucleotide chains b. polarity (running in same direction or opposite directions) c. bases on interior or exterior of molecule d. sugar/phosphate on interior or exterior of molecule e. which bases pair with which f. right- or left-handed helix

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