MERTK and mantle cell lymphoma: UNC2250 significantly suppressed proliferation of MerTK-positive Z-138, Mino, JVM-2, and JVM-13 cells, but had little effect on MerTK-negative JeKo-1 and Granta519 cells; thus, the effects of UNC2250 on MCL cells are MerTK specific and not due to off-target inhibition.