Flow cytometry analysis of expression of PSGL-1, Lex/CD15, and sLex/sCD15 on K562 cells stably transfected with cDNA encoding PSGL-1, FucT-VII, or both. Note that PSGL-1 levels on K562/PSGL-1 and K562/PSGL-1/FucT-VII cells are equivalent and slightly higher than the levels of HL60 cells, and that the level of sLex on K562/PSGL-1/FucT-VII cells is lower than on K562/FucT-VII cells, corresponding to lower levels of FucT-VII mRNA (see Fig 2).