Logarithmic transformation (of the standard deviation for the peptide sequence expression level for the atrophic and cancer peptide fragments against the logarithmic transformation of the mean peptide sequence expression levels) indicated concordance with a linear model predictive of good quality data, with the most expressed protein being serum albumin for all samples (yellow dots in Figure 2B), despite copious washing of samples with saline prior to protein fragmentation. Here, ALB is linked to cancer.