Flow cytometry analysis has demonstrated that the target recognized by NEO-201 is expressed in CD15+ granulocytes [4], human regulatory T (Treg) cells [5] and several human hematopoietic neoplastic cell lines, including acute myeloid leukemia (AML) cell lines (HL-60, U937) and multiple myeloma (MM) cell lines (OPM2, MM1.S) [6]. Here, FUT4 is linked to acute myeloid leukemia.