Off topic:De novo sequencing homework question, what is the parent peptide mass?
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3.4 years ago
nobu.kim66 ▴ 40

imglink

In that example, 129+216+327 does not equal the parent's mass of 492.
My understanding is that during MS, the protein is broken down into peptide masses of varying length of approx. 5 to 20 amino acids. They also lose ions such as water or ammonia like in the example., the experimental spectra I thought would show the masses of these "children" that can be summed up to the parent. But that is not the case. Where am I wrong in my understanding?

spectrometry • 296 views
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