We found that a suspension T-cell leukemia cell line Jurkat expresses high levels of SDF-1α responsive CXCR4 receptors while adherent HeyA8 ovarian cell line expresses low levels of CXCR4 and failed to respond to SDF-1α in a phospho-ERK assay (Fig. 1B). This evidence concerns the gene MAPK1 and T-cell leukemia.