Additional file 7: Figure S7. Quantification of proliferating cells. A: Representative histological staining of transplanted NPCs against proliferation marker Ki67 (blue) and human nuclei (green; grafted cells), 35d post transplantation in stroked Rag2-/- mice. Arrowheads indicate Ki67-expressing cells that are negative for HuNu. B: Quantification of cells positive for HuNu and Ki67.