The activity of many proteins is controlled through phosphorylation by kinases and dephosphorylation by phosphatases. Overactive kinases are one of the major drivers of tumors and, as a result, kinase inhibitors are a mainstay of oncology drug development. But “activation of the brakes, the phosphatases, could be equally therapeutically viable for the treatment of a broad range of cancers” to kinase inhibition, Goutham Narla told the audience at the 2020 American Association for Cancer Research (AACR) meeting.