No monkeying around: clonal tracking of stem cells and progenitors in the macaque.

Clonal tracking of hematopoietic stem and progenitor cells (HSPCs) has proven valuable for studying their behavior in murine recipients. Now in Cell Stem Cell, Kim et al. (2014) and Wu et al. (2014) extend these analyses to nonhuman primates, providing insights into dynamics of HSPC expansion and lineage commitment following autologous transplantation.