Extracted ion chromatograms of desialylated sulfated glycoforms, purified from serous cyst fluids from OC patients with benign (labeled ingreen) and malignant (labeled inred) tumors. Glycan sequences were interpreted from MS2, MS3, and MS4 experiments. Glycan panel names (909, 989, 1194, 1274, 1639, and 1719) correspond to their mass in the deprotonated form and are listed in supplemental Table S1. For key to symbols, see Figure 1.