To examine whether the PC-3 xenograft tumors contained mixtures of CD-11b-positive (CD11b+) tumor cells and tumor-associated CD11b+ myeloid cells from the mouse host, we performed hematopoietic cell purification assays to isolate mouse CD11b+ and Gr1+ myeloid populations from the PC-3 xenograft tumors using a mouse-hematopoietic lineage-specific EasySep kit (Figure 3d,e). This evidence concerns the gene ITGAM and neoplasm.