SERPINA1 and oral cavity squamous cell carcinoma: The design of this biosensing system is illustrated in Figure 7B. The biosensing platform successfully demonstrated the simultaneous detection of epidermal growth factor receptor (EGFR) markers in oral squamous cell carcinoma, as well as alpha-fetoprotein (AFP) and alpha-1-antitrypsin (A1AT) markers in Hep3b cells.