ROCK1 and neoplasm: Conditionally activated ER‐fusions with ROCK1 (ROCK1:ER) or ROCK2 (ROCK2:ER) kinase domains, or green fluorescent protein (GFP:ER), were stably retrovirally transduced and expressed in non‐invasive PDAC tumor cells derived from Pdx1‐Cre; LSL‐KrasG12D; LSL‐p53fl/+ (KPflC) mice (Fig 2B).