Figure 6. The proportion of SP cells in tumors formed with sorted 769P SP and NSP cells.

A, cells were dissociated from the tumor formed with 200 769P SP cells; B, cells were dissociated from the tumor formed with 20,000 769P NSP cells. The proportion of SP cells was higher in SP cell-formed tumor than in NSP cell-formed tumor (1.5% vs. 0.2%).