ANXA5 and diffuse large B-cell lymphoma: Subsequent cell viability analysis in these two DLBCL cell lines by Annexin V-propidium iodide (PI) assay demonstrated a high sensitivity to ABT-199, with an IC50 of 50 nM for SU-DHL-6 and 70 nM for OCL-LY-19 (Figures 1c and d).