(A) Representative IL-15 RT-PCR results from the three CTCL cell lines HUT78, MyLa, SeAx, and Sézary cells from nine patients. M, Boehringer marker V; the sizes of the most important marker bands are given on the left. Lanes 1 through 3, the cell lines MyLa, HuT 78, and SeAx; lanes 4 through 12, Sézary cells from nine patients; lane 13, PBLs of a healthy donor; lane 14, monocyte-depleted PBLs of a healthy donor. (B) Corresponding results of a β-actin PCR, which served as a control. The sizes of the RT-PCR products are given on the left.