ENO1 and neoplasm: Other metabolism-related proteins, such as lactate dehydrogenase (LDHA), the ATP synthase subunit 5B (ATP5B), the glycolysis enzyme glyceraldehyde 3 phosphate dehydrogenase (GAPDH), phosphoglycerate kinase 1, (PGK1) and enolase-1 (ENO1), were also highly expressed (up to 14-fold higher) in the tumor tissues, as determined by LC-HR-MS/MS analysis (Figure 3A, 3C, 3D, 3E).