Fig. 3From: Identification of potential serum biomarkers for breast cancer using a functional proteomics technologyDirect measurement of protease activity from normal and breast cancer serum after PEP protein separation and elution. The conditions were the same as in Fig. 1 except protease substrate was added to the assay plate. The assay was carried out at room temperature overnight, for more details please refer to the material and method. Boxed fractions indicated samples of interestBack to article page