One student has synthesized the followingpeptide: LIVGFGIA, and predicted theproperties of this polypeptide. Which of thefollowing predictions is WRONG?O a.O b.O C.O d.This peptide may form disulfide bond.The side chains of this peptide cannot formhydrogen bond with water.This peptide has UV absorbance at 280 nm.This peptide is very hydrophobic.

Amino acids are biomolecules that have an amino group and a carboxyl group linked to the same carbon…

Answered: One student has synthesized the…

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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Similar questions

Consider the following peptide: Lys-Tyr-Glu-His-Arg-Ala-Asp-Arg-Glu-Tyr-Lys a) What is the net charge of this peptide at pH=1? Show your work. b) What is the net charge of this peptide at pH=14? Show your work.
A peptide containing 18 amino acid residues in its sequence was partially hydrolyzed and peptides A–D were detected in the resulting mixture. Draw the sequence of the original peptide.A Phe-Gly-AlaB Ser-Ser-Ser-Trp-Phe-Gly-AlaC Phe-Phe-Met-Ala-Ala-Pro-Trp-CysD Met-Ala-Ala-Pro-Trp-Cys-Leu-Ile-Leu-Ser-Ser
What protecting groups in solid-phase peptide synthesis NOT do? a)Activate the carboxlic acid to have a good leaving group b)Prevent the amino acid backbones from randomly polymerizing in solution c)Prevent the amino acid side chains from undergoing uncontrolled chemistry
What protecting groups in solid-phase peptide synthesis NOT do? a)Activate the carboxlic acid to have a good leaving group b)Prevent the amino acid backbones from randomly polymerizing in solution c)Prevent the amino acid side chains from undergoing uncontrolled chemistry d)Get cleaved from the peptide when the peptide is cleaved from the resin
The amino acid sequence of three peptide fragments are shown below. Peptide 1: QAMGRAGDLKYLGLHSV Peptide 2: ALMALFMVMALVLVSVLFIA Peptide 3: MVEDLLKQIARYLISE (a) Circle all of the charged residues in peptide 1 (assume pH =7.0). Box all of the aromatic residues in peptide 2. Underline all of the nonpolar residues in peptide 3. (b) Determine the net charge of the predominant form of each of the peptides at pH 4.5 and pH 11.5. Assume the ionizable groups have the pKa values listen in Table 2.1 of your text. (c) Which of these peptides would be most likely to be found as an alpha helix in a soluble (cytoplasmic) protein? Which would be most likely to be found as an alpha helix in a transmembrane protein? Which would be least likely to form an alpha helix of any kind?
What protecting groups in solid-phase peptide synthesis NOT do? a)Activate the carboxlic acid to have a good leaving group b)Prevent the amino acid backbones from randomly polymerizing in solution
Draw out the peptide DPGS as it would appear in a Type II β-turn and clearly label/identify all the Hydrogen bonds present between atoms (as well as other characteristic features of the β-turn). Be sure to draw out the entire peptide and label the N- and C-termini. Which residues in this peptide are characteristic of this secondary structure and what do they do?
Which of the numbered bonds in this polypeptide fragment are peptide bond(s)? (Select all that apply!)
Give the amino acid sequence of each peptide using the fragmentsobtained by partial hydrolysis of the peptide with acid. a tetrapeptide that contains Ala, Gly, His, and Tyr, which is hydrolyzedto the dipeptides His–Tyr, Gly–Ala, and Ala–His
Draw the bond-line structure of the given peptides. 1. Ser-Asp 2. Glu-Gln 3. Arg-His 4. Ala-Val-Ser 5. Glu-Gln-Gly 6. Cys-Gly-Asn
The peptide KNYPEH N-terminal amino group has a pKa of 8.6 and the C-terminal carboxylate group has a pKa of 4.5. What is the net charge of this peptide at a pH of 1, 7, and 15?
What is the overall charge on peptide AVGDWESKELLE at pH 7.0? a. -3 b. -2 c. 0 d. +1 Which of these decapeptide is the most hydrophobic? 1. ADEEEHNRQL 2. AVLKTIFYRS 3. AVLTIIFYRG 4. AVLTDNQLPK

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