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On the mass spectrum given in Supplemental Sheet 1, the 'y7' and the 'yg' ions, both carrying one positive charge and differing by one amino acid residue, are shown as having peaks at m/z = 880.46 and m/z = 979.49, respectively. (i) Explain using appropriate chemical equations what is meant by a 'y' ion. (ii) The y7 and y8 ions differ by one amino acid. Identify this amino acid residue from the following three possibilities. Show all your workings. Average Molecular Weight Amino Acid Alanine Valine Serine (g mol-¹) 89.09 117.15 105.09

On the mass spectrum given in Supplemental Sheet 1, the 'y7' and the 'yg' ions, both carrying one positive charge and differing by one amino acid residue, are shown as having peaks at m/z = 880.46 and m/z = 979.49, respectively. (i) Explain using appropriate chemical equations what is meant by a 'y' ion. (ii) The y7 and y8 ions differ by one amino acid. Identify this amino acid residue from the following three possibilities. Show all your workings. Average Molecular Weight Amino Acid Alanine Valine Serine (g mol-¹) 89.09 117.15 105.09

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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On the mass spectrum given in Supplemental Sheet 1, the 'y7' and the 'yg' ions, both carrying one positive charge and differing by one amino acid residue, are shown as having peaks at m/z = 880.46 and m/z = 979.49, respectively. (i) Explain using appropriate chemical equations what is meant by a 'y' ion. (ii) The y7 and y8 ions differ by one amino acid. Identify this amino acid residue from the following three possibilities. Show all your workings. Average Molecular Weight Amino Acid Alanine Valine Serine (g mol-¹) 89.09 117.15 105.09
Transcribed Image Text:On the mass spectrum given in Supplemental Sheet 1, the 'y7' and the 'yg' ions, both carrying one positive charge and differing by one amino acid residue, are shown as having peaks at m/z = 880.46 and m/z = 979.49, respectively. (i) Explain using appropriate chemical equations what is meant by a 'y' ion. (ii) The y7 and y8 ions differ by one amino acid. Identify this amino acid residue from the following three possibilities. Show all your workings. Average Molecular Weight Amino Acid Alanine Valine Serine (g mol-¹) 89.09 117.15 105.09
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