PEAK1 and pancreatic neoplasm: Prasad et al. developed an immunoassay employing a single component of GO paper-based electrode nanocomposites and AuNP-modified anti-PEAK1, in which the synthesis of AuNP-modified anti-PEAK1 was utilized to electrocatalytically reduce PEAK1 to deliver electrical pulses by redox reaction of potassium ferricyanide for sensitive pancreatic cancer biomarker PEAK1 detection [96].