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. Author manuscript; available in PMC: 2013 Nov 17.
Published in final edited form as: J Proteome Res. 2012 May 17;11(6):3053–3067. doi: 10.1021/pr3001546

Figure 1.

Figure 1

Histograms of distributions of peptide abundances in 10 control (top two rows) and 10 AD (bottom two rows) brain samples. Vertical axis – number of peptides. Horizontal axis : log2(Iik/mIk), where mIk=ΣIik/N – mean abundance of the given peptide across all 20 samples.