PLA is sensitive to total protein level. a Nalm6 wild type, depleted for RUNX1 protein (Nalm6shRUNX1) or overexpressing RUNX1 (Nalm6+RUNX1) cell lines were validated using RT-qPCR. Results are presented in terms of a fold change after normalizing RUNX1 mRNA levels with GAPDH mRNA. Each value represents the mean of ± S.D. of three independent transduced cells. b Representative images of western blot (left panel) and densitometry analysis (right panel) showing the quantification of RUNX1 protein level normalized to HSC70 c Quantification of the PLA signal (dots plots) on Nalm6 cells displaying a gradient of expression of RUNX1 is represented. Nalm6, Nalm6shRUNX1 or Nalm6+RUNX1 cells were incubated with a pair of RUNX1 antibodies (the mean values ± S.D. are presented)