PEAK1 and familial pancreatic carcinoma: 186 Prasad et al. have developed a low-cost disposable paper-based electrode modified with a GO-based electrochemical biosensor to identify pancreatic cancer-specific biomarkers pseudopodium-enriched atypical kinase 1, SGK269 (PEAK1).187 The immunosensor operated well with a linear range of 10 –106 pg mL−1 and a limit of detection of 10 pg mL−1.