Hematopoietic stem cells (HSCs) are self-renewing cells that give rise to cells of the hematopoietic system including those of the myeloid lineage (monocytes, macrophages, basophils, neutrophils, eosinophils, erythrocytes, megakaryocytes, platelets, and dendritic cells) and the lymphoid lineage (T cells, B cells, and NK cells). HSCs can be isolated from bone marrow, cord blood, and peripheral blood. However, the cells are rare and are similar to leukocytes in morphology. Therefore, HSCs are typically identified by functional assays and marker expression. R&D Systems offers a range of products for HSC research including premium quality antibodies, expansion media, proteins, and Methylcellulose media for performing colony forming cell (CFC) assays.