Supplementary Figure 3: Flk1+Runx1+ cells are found in all anatomical stages.

Principal component analysis coloured according to stage of sorting (top) and whether cells express both Flk1 and Runx1 at the gene expression level (bottom). Cells not expressing both genes shown in grey. Blue, PS; green, NP; orange, HF; red, 4SG; purple, 4SFG⁻.