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. Author manuscript; available in PMC: 2014 Feb 27.
Published in final edited form as: J Am Chem Soc. 2013 Feb 13;135(8):3186–3192. doi: 10.1021/ja3114505

Figure 3.

Figure 3

Comparison of collision cross section distributions of the three [M+3H]3+ double Pro→Ala substituted peptide analogues (red traces) with BK (dashed trace). Amino acid size parameters from ref. 33 were used to calibrate cross section scales of the analogues to BK. Intensities were normalized to peak maxima of BK for ease of visualization.