2. Vasopressin, a substance produced by the human body that regulates blood volume and pressure, is a nonapeptide with the following amino acid sequence. Describe the results you would expect when vasopressin is tested with the following reagents. GLY-ARG-PRO-CYS-ASN-GLN-PHE-TYR-CYS test xanthoproteic Millon's Hopkins-Cole nitroprusside RT observation 2Y 02, 2IN1 SA ger

2. Vasopressin, a substance produced by the human body that regulates blood volume and pressure, is a nonapeptide with the following amino acid sequence. Describe the results you would expect when vasopressin is tested with the following reagents. GLY-ARG-PRO-CYS-ASN-GLN-PHE-TYR-CYS test xanthoproteic Millon's Hopkins-Cole nitroprusside RT observation 2Y 02, 2IN1 SA ger

Anatomy & Physiology

1st Edition

ISBN:9781938168130

Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Chapter2: The Chemical Level Of Organization

Section: Chapter Questions

Problem 23RQ: A substance dissociates into K+ and Cl- in solution. The substance is a(n) ________. acid base salt...

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1. The chromatography solvent is very polar as it contains alcohol, an acid and water. Based on this information, list all the polar amino acids and arrange them from most polar to least polar.
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8. A dipeptide T, obtained from the breakdown of an enzyme found in the human body, is made up of Amino Acids R and S. (a) Classify Amino Acids R and S as an acidic amino acid or a basic amino acid. (b) Name Bond Q. (c) State any ONE type of protein that could be found in human body. (2%) (1%) (1%)
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2. A group of peptides that influence nerve transmission in certain parts of the brain have been isolated from normal brain tissue. These peptides are known as opioids. Using the information below, determine the amino acid sequence of this particular opioid: ● Complete hydrolysis by HCl at 100° C followed by amino acid hydrolysis analysis indicated the presence of Gly, Leu, Phe, and Tyr, in a 2:1:1:1 ratio. ● Treatment of the peptide with FNDB followed by complete hydrolysis indicated the presence of 2,2-dinitrophenyl derivative of tyrosine. No free tyrosine could be found. ● Complete digestion of the peptide with chymotrypsin yielded free tyrosine and leucine, plus a tripeptide containing Phe and Gly in a 1:2 ratio. Instructions Make use of the table below to determine the sequence of the mystery protein:
An amino acid mixture consisting of lysine,leucine, and glutamic acid is to be separated by ion-exchangechromatography, using a cation-exchange resin at pH 3.5, with theeluting buffer at the same pH. Which of these amino acids will beeluted from the column first? Will any other treatment be neededto elute one of these amino acids from the column?
2. A mixture of the following amino acids (glu, leu, val, arg, ser, phe) was obtained upon complete hydrolysis of a hexapeptide. a. Edman’s reagent releases leucine b. Hexapeptide with carboxypeptidase releases serine. c. Hexapeptide with trypsin forms a tripeptide A with leucine at the N terminal and tripeptide B with valine at the N terminal. d. Tripeptide A with carboxypeptidase releases arginine and a dipeptide with glutamic acid at C terminal. e. Tripeptide B with chymotrypsin form releases serine and another dipeptide. Give: 1. the amino acid sequence of tripeptide A and B. 2. the amino acid sequence in the above hexapeptide.