CLDN18 and gastric neoplasm: To further evaluate the tumorigenic potential of METTL10, we isolated primary gastric tumor cells, referred to as ATK cells, from Cldn18‐CreERT2; Apcfl/fl; Trp53fl/fl; KrasG12D (Cldn18‐ATK) mice.[17] We then generated METTL10‐overexpressing ATK cells (Figure S1s, Supporting Information) and established orthotopic GC models by injecting these cells into the subserosal layer of the stomach.