SEPTIN2 and acute myeloid leukemia: Among the differentially modulated phosphosites, 11 (7 down-phosphorylated) and 8 (3 down- phosphorylated) are reported as bona fide CK2 substrates in HL-60 and OCI-AML3 cells, respectively; and septin-2 phospho-serine 218 (SEPTIN2 S218), a well-documented CK2 substrate, appeared inhibited in both AML cell lines (Table S5).