...7 BCR signaling inhibitors (BCRi, including PI3K inhibitors idelalisib, duvelisib, umbralisib...Notably, Sf3b1mut/Atmdel CLL cells were more resistant to the panel of BCRi than MDR cells (p=0.046, the Van Elteren test) and their dependence on BCL-2 for survival after BCRi was likewise diminished (p=0.018, the Van Elteren test…