Question: (a) The ESI-MS spectrum below was obtained for HEWL. Using peaks 5 and 6, calculate the molecular mass of HEWL (see Sample Calculation 5-1). [Spectrum

(a) The ESI-MS spectrum below was obtained for HEWL. Using peaks 5 and 6, calculate the molecular mass of HEWL (see Sample Calculation 5-1).
(a) The ESI-MS spectrum below was obtained for HEWL. Using

[Spectrum obtained from
www.astbury.leeds.ac.uk/facil/MStut/mstutorial.htm]
(b) What is the charge on the ion that makes peak 5?

5 1590.6 100 H 6 1789.2 4 1431.6 2 3 1301.4 B 50 7 2044.6 1193.1 1101.5 0 1000 120 1400 1600 1800 2000 2200 m/z

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