MCL1 and T-cell large granular lymphocyte leukemia: Similar results were observed in large granular lymphocytic leukemia (LGLL) patient samples, where (+/−) marinopyrrole A potency was positively correlated with Mcl-1 expression: patient samples with the highest Mcl-1 protein levels produced IC50 values between 4.64 μM and 11.84 μM [43].