STK26 and cancer: In this study, we discovered that RIPK2 interacts with six protein kinases: MKK7 (MAP2K7), DNA-PKcs (PRKDC), RSK2 (RPS6KA3), MST4 (STK26), MEK2 (MAP2K2), and CSK (CSK), many of which were implicated in cancer metastasis62.