Figure 1: Protein profile of malignant and benign tumor fluids. A: 2.5 μl of each sample of malignant tumor fluids (left gel) and of benign tumor fluids (right gel) were applied to an SDS-PAGE gel (8-16%). Note that the benign fluid samples B5, B7 and B10, indicated by arrows, contain only a few proteins. B: SDS-PAGE gel of the malignant tumor fluid pool (M) and benign tumor fluid pool (B) after albumin and IgG depletion. STD: standard.