CDH17 and cancer: Similarly, cell staining data with engineered bacteria also disclosed that Nb289‐engineered MG1655 could specifically recognize CDH17 expressed on MKN45 cancer cells since CDH17 knockdown completely abolished the binding activity of Nb289‐engineered bacteria; C9 bacteria showed negative binding activity to MKN45 cells unrelated to CDH17 expression (Figure 4f,g).