B-mercaptoethanol is a reducing agent for disulfidebonds, resulting in the breakage of the disulfide bond.The structure of the human milk protein B-casein isunaffected when exposed to B-mercaptoethanol. Whatdoes this indicate about the composition of B-casein?Select the best option.a. B-casein has no / few cystines.b. B-casein has no / few cysteines.c. B-casein has no / few methionines.d. B-casein has no / few amino acids with chiral sidechains.

Disulphide bond is a disuphide bridge between two cysteine residues which are in close proximity.…

Answered: B-mercaptoethanol is a reducing agent…

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

Alginic acid, isolated from seaweed and used as athickening agent for ice cream and other foods, is apolymer of d-mannuronic acid with b(1,4) glycosidiclinkages.a. Draw the structure of alginic acid.b. Why does this substance act as a thickening agent?
What type of protein is included in milk? When milk sourness occurs, why does this protein precipitate?Discuss the overall process or mechanisms that cause proteins to precipitate.What is the definition of amphoterism? Show the amphoteric property of protein using a chemical equation. Strictly no plagiarism. Please cite the references.
Lead acetate solution is an agents of denaturation. Explain in 10 sentences the effect of each on proteins.
Show the peptides that would result from cleavage by the indicated reagent: a. Val-Arg-Gly-Met-Arg-Ala-Ser by carboxypeptidase A b. Ser-Phe-Lys-Met-Pro-Ser-Ala-Asp by cyanogen bromide c. Arg-Ser-Pro-Lys-Lys-Ser-Glu-Gly by trypsin
A mixture of Alanine (pl 6.02), Glutamic Acid (pl 3.22), Glycine (pl 5.79), Lysine (pl 9.74) and Threonine (pl 6.53) are separated by cation exchange chromatography. What is the order of elution of these amino acids if you use gradient buffer system from pH 10 to pH 2 ? v First 1. Alanine v Second 2. Glutamic Acid v Third 3. Glycine v Fourth 4. Lysine v Fifth 5. Threonine 6. No separation
A mixture of Alanine (pl 6.02), Glutamic Acid (pl 3.22), Glycine (pl 5.79), Lysine (pl 9.74) and Threonine (pl 6.53) are separated by anion exchange chromatography. What is the order of elution of these amino acids if you use gradient buffer system from pH 10 to pH 2 ? v First 1. Alanine v Second 2. Glutamic Acid v Third 3. Glycine 4. Lysine v Fourth 5. Threonine v Fifth 6. No separation
Draw the structure of: a. 1-palmitoleyl-2-linolenyl-3-stearyltriglyceride. b. 1-linolenyl-2-arachidyl-3-phosphatidylserine.
Answer the following questions about monosaccharide B. Draw the β anomer of B in a Haworth projection.
Make use of the table below in answering the questions asked: Amino acid pK₁ pK₂ pK, Isoleucine 2.32 9.76 Leucine 2.32 9.74 Lysine 2.16 9.06 10.54 Tyrosine 2.20 9.21 10.46 I 1. Make sure to answer in two decimal places. What is the pl of the tripeptide ILY? 2. At pH 9.00, at which electrode will the ILY tripeptide be moving to? A. Anode B. Cathode C. The tripeptide will not move to either electrodes Make sure to show a solution or explanation for the answer.
The alkaline hydrolysis of pAUGCAGC oligonucleotide produces: O A. Uridine 2'-monophosphate, uridine 3'-monophosphate, cytosine 2'-monophosphate O B. Adenosine 2'-monophosphate, adenosine 3'-monophosphate, adenosine 21,5'-bisphosphate OC. Guanosine 2'-monophosphate, guanosine 3'-monophosphate, cytosine 3'-monophosphate O D. Cytidine 3'-monophosphate, guanosine 2'-monophosphate, adenine 2'-monophosphate O E. Adenine 3,5'-bisphosphate, guanine 2,5'-bisphosphate, uridine 2'-monophosphate O F. Uridine 2'-monophosphate, uridine 3'-monophosphate, guanine 3'-monophosphate
Indicate whether the following pairs of monosaccharides are aldoses or ketoses. a. D-altrose & D-xylose b. D-arabinose & D-glyceraldehyde c. D-erythrulose & D-psicose d. D-talose & D-gulose e. dihydroxyacetone & D-tagatose f. D-idose & D-threose
Draw the following compounds: a. α- and β-anomers of D-galactose b. aldonic acid, uronic acid, and aldaric acid derivatives of galactose c. galactitol d. δ-lactone of galactonic acid

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