OGT and gastric cancer: Furthermore, we demonstrated that circPRELID2 significantly increased global O‐GlcNAcylation in gastric cancer cells, whereas circPRELID2‐Mut failed to do so (Figure S7a, Supporting Information), suggesting that circPRELID2 may also participate in OGT‐mediated O‐GlcNAcylation of additional substrates.