FCRL1 expression on patients with various hematologic malignancies. Representative FACS analysis. Peripheral blood cells from a patient with CLL and lymph node cells from a patient with FL were analyzed by FACS with PerCP-CD19 and anti-FCRL1 E3-PE. Cells gated for lymphocytes were shown in the dot plots with CD19 (y-axis)– and FCRL1 (x-axis)–positive staining.