Notably, for early‐stage GC detection, the performance of AACT‐N106‐H7N6S4F1 (AUC, 0.897; 95% CI, 0.794‐0.999) was much better than serum CEA (AUC, 0.663; 95% CI, 0.450–0.876) (Figure 4i). The gene discussed is CEACAM5; the disease is gastric cancer.