Fig. 1. Comparison of global proteolytic activity in mucinous and nonmucinous cysts by MSP-MS.
Volcano plots displaying the peptide cleavages generated by mucinous (n=16) and nonmucinous cysts (n=7) when assayed at pH 7.5 (A) or pH 3.5 (B). Spectral counts of peptide cleavage products were used for relative quantification of the fold change (mucinous/nonmucinous) and hypothesis testing. Cleavages that met the criteria for differentiating mucinous from nonmucinous cysts (+/− 1 log2(fold change), p < 0.05) are shown in blue. The substrate specificity of the cleavages within the red box is displayed with an iceLogo plot (C). Residues shown are statistically significant with p < 0.05.