MCL1 and B-cell chronic lymphocytic leukemia: While a higher proportion of cycling del(13q)+ CLL cells (6/8 = 75%) than del(13q)−/− cells (2/4 = 50%) displayed elevated MCL1 (RMFI ≥ 2), subsequent box plot and statistical analysis showed no statistically significant difference between cohorts with/without del(13q), either when maximal MCL1 attained (Figure 4G) or division subset with maximal MCL1 (Figure 4H) were assessed as parameters.