Several ALCL cell lines (KARPAS-299, L-82, MAC-1, SU-DHL-1 and TS) were analyzed for their PSGL-1 surface expression by flow cytometry; two different anti-PSGL-1 antibodies (KPL-1 and TB5) detected a high protein expression in more than 80% of the cells (Figure S9). Here, SELPLG is linked to anaplastic large cell lymphoma.