a) Electrospray ionization of this small protein typically results in major charge states of +8, +9, +10, +11, +12, and +13.  Using this information, complete the table below, assuming the charges on each come from protonation.  Report mass and m/z values to the ones place.  b) Using the data you entered in the table, sketch an expected ESI-MS spectrum for ubiquitin. Label each peak with its charge state.  What do you notice about the spacing of peaks along the x-axis. c)The figure shows an experimentally obtained electrospray mass spectrum for ubiquitin. Compare this spectrum to the spectrum you predicted. Are there any differences? If so, what might cause these differences?

Principles Of Radiographic Imaging: An Art And A Science
6th Edition
ISBN:9781337711067
Author:Richard R. Carlton, Arlene M. Adler, Vesna Balac
Publisher:Richard R. Carlton, Arlene M. Adler, Vesna Balac
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1)Ubiquitin is a small protein with a monoisotopic mass of 8560 Da.

a) Electrospray ionization of this small protein typically results in major charge states of +8, +9, +10, +11, +12, and +13.  Using this information, complete the table below, assuming the charges on each come from protonation.  Report mass and m/z values to the ones place. 

b) Using the data you entered in the table, sketch an expected ESI-MS spectrum for ubiquitin. Label each peak with its charge state.  What do you notice about the spacing of peaks along the x-axis.

c)The figure shows an experimentally obtained electrospray mass spectrum for ubiquitin. Compare this spectrum to the spectrum you predicted. Are there any differences? If so, what might cause these differences?

ESI-MS spectrum of bovine ubiquitin from Protea Biosciences.
779.83
100
714.92
857.67
952.75
660,00
1071.75
1224.75
1428.67
1714.00
o da
400
600
800
1000
1200
1400
1600
1800
m/z
Relative Abundance
Transcribed Image Text:ESI-MS spectrum of bovine ubiquitin from Protea Biosciences. 779.83 100 714.92 857.67 952.75 660,00 1071.75 1224.75 1428.67 1714.00 o da 400 600 800 1000 1200 1400 1600 1800 m/z Relative Abundance
Mass of [M+zH]
m/z
9
10
11
12
13
Transcribed Image Text:Mass of [M+zH] m/z 9 10 11 12 13
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