IκB Kinase (IKK) activity and expression in normal B cells and B-CLL lymphocytes.

IKK activity (upper panel) and protein expression (lower panel) were similar in normal CD19⁺ B cells (lanes 1, 2, 7, 8) and B-CLL lymphocytes (lanes 3-6). An IκB substrate mutated at positions 32 and 36 was not phosphorylated (data not shown).