An ESI-MS positive ion mode mass spectrum of a protein gave neighboring peaks at 385.3 m/z and 577.5 m/z. These two peaks differed in their charge state by 1. What is the charge of the two species? O5.6 4, 5 O2, 3 O6,7 O 3,4 O1, 2

An ESI-MS positive ion mode mass spectrum of a protein gave neighboring peaks at 385.3 m/z and 577.5 m/z. These two peaks differed in their charge state by 1. What is the charge of the two species? O5.6 4, 5 O2, 3 O6,7 O 3,4 O1, 2

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter20: Molecular Mass Spectrometry

Section: Chapter Questions

Problem 20.9QAP

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Question

An ESI-MS positive ion mode mass spectrum of a protein gave neighboring peaks at
385.3 m/z and 577.5 m/z.
These two peaks differed in their charge state by 1. What is the charge of the two
species?
O5, 6
04, 5
O 2, 3
O6,7
O 3, 4
1,2

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