hematopoietic stem cell A stem cell from which all cells of the lymphoid and myeloid lineages develop, including blood cells and cells of the immune system. Hematopoietic stem cells lack cell markers of effector cells (lin-negative). Lin-negative is defined by lacking one or more of the following cell surface markers: CD2, CD3 epsilon, CD4, CD5 ,CD8 alpha chain, CD11b, CD14, CD19, CD20, CD56, ly6G, ter119. BTO:0000725 CALOHA:TS-0448 FMA:70337 FMA:86475 HSC Markers differ between species, and two sets of markers have been described for mice. HSCs are reportedly CD34-positive, CD45-positive, CD48-negative, CD150-positive, CD133-positive, and CD244-negative. VHOG:0001485 blood forming stem cell cell colony forming unit hematopoietic hemopoietic stem cell somatic stem cell hematopoietic precursor cell