An π helix can be described as a 4.4, helix. Explain16what this designation means. Given the pitch of thehelix is 5.2 angstroms, how long in(nm) is the pi helixthat has six residues.

●A π helix is a type of secondary structure found in proteins.The amino acids in a standard π-helix…

Answered: An π helix can be described as a 4.4…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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b) It's said that secondary structures form because of intra- and intermolecular hydrogen bonding involving the peptide bond. Describe what is going on to further stabilize secondary structure through these interactions.
Answer the following using the structure: a. Is this a purine or pyrimidine? b. Is this a deoxyribonucleotide or a ribonucleotide? c. Indicate the component that changes this from a nucleoside to a nucleotide.
Polylysine adopts a random structure in solution at physiological pH (i.e. 7.4). Given that the e-amino group of lysine has a pKa of 10.5, under what circumstances do you think polylysine will form an a-helix? Give an explanation for your decision. Given the pKa of the side-chain COOH group, under what circumstances would you anticipate polyglutamate to form an a-helix?
The structure of an alpha helix orients the oxygens of the carbonyl group of the peptide bond towards the C-terminal end of the helix while the hydrogens of the NH groups orient toward the N-terminal end, thus imparting a dipole along the length of the helix. As a result, which kinds of amino acids would favor the C-terminal end, and which would favor the N-terminal end? negatively charged, positively charged positively charged, negatively charged negatively charged, hydrophobic positively charged, hydrophobic hydrophobic, negatively charged hydrophobic, positively charged
please match all of them
A researcher isolates a new protein and finds that it contains 0.755% serine by weight upon amino acid analysis. The molecular mass of serine is 105 g.mol-¹. What is the minimum molecular mass for the protein assuming only one Ser residue per protein molecule? mmin = The researcher estimates the molecular mass of the protein using gel electrophoresis. From this estimated molecular mass, the researcher concludes the protein contains 3 Ser residues. What is the estimated molecular mass of the protein as shown by gel electrophoresis? g.mol-¹ mest = g.mol-1

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An π helix can be described as a 4.4 helix. Explain 16 what this designation means. Given the pitch of the helix is 5.2 angstroms, how long in(nm) is the pi helix that has six residues.