title: Heterogeneity of molecules with low molecular weight isolated from media conditioned by human leukocytes and capable of stimulating colony formation by human granulopoietic progenitor cells.
mesh_terms: D001682:Biological Availability; D002455:Cell Division; D002478:Cells, Cultured; D002855:Chromatography, Thin Layer; D002918:Chymotrypsin / Q000378:metabolism; D002999:Clone Cells; D003470:Culture Media; D006412:Hematopoietic Stem Cells / Q000276:immunology*; D006801:Humans; D007457:Iodine Radioisotopes; D007951:Leukemia, Myeloid; D015470:Leukemia, Myeloid, Acute; D007962:Leukocytes / Q000276:immunology*; D008970:Molecular Weight; D014357:Trypsin / Q000378:metabolism
chemical_list: D003470:Culture Media; D007457:Iodine Radioisotopes; D002918:Chymotrypsin; D014357:Trypsin