METTL5 and gastric cancer: METTL5 protein was investigated to indicate the prognosis of GC patients, we divided them into high- and low-expression groups based on the median expression of METTL5 protein, and Kaplan–Meier survival analysis manifested that the prognosis of the group with high METTL5 protein expression was significantly better than that of the group with low METTL5 protein expression (p < 0.001) (Fig. 4a).