Representative example of FACS profiles for BCP-1 and HBL-6 cells and cells obtained from Nod/SCID ascitic fluid. EBV⁺ Daudi cells were used as a control. Fluorescence intensity is expressed on an arbitrary logarithmic scale. Black histograms represent antibody stained cells, and white histograms are isotype-specific controls for each antibody used. As previously shown, KSHV⁺ PEL cells lack B-cell markers including CD19, but express EMA. ICAM-1 or CD54 is an important adhesion molecule present on most lymphoma cells and upregulated by EBV LMP-1.