Figure 5
From: Accurate and Efficient Resolution of Overlapping Isotopic Envelopes in Protein Tandem Mass Spectra

Interpreted isotopic peaks and abundance of the myoglobin HCD spectra when two incremental combinatorial ions series, b/y and b/y + b/y-NL (including a and a-NL), are searched separately.
The error bars arise from three technical replicates. IPs = Isotopic Peaks.