IKZF1 and lymphoma: Initial attempts to establish ChIP conditions for Ikaros in Raji burkitt’s lymphoma cells employing antibodies directed against the Ikaros C-terminus were difficult and could be ascribed to the fact that Raji burkitt’s lymphoma cells exhibit an abundant expression of small Ikaros isoforms (data not shown), which are not able to bind DNA directly but can multimerize with IK1 and Ik2 (DNA binding) isoforms.