title: Contamination of commercial leukocyte-derived human interleukin 2 with interleukin 1.
abstract: Commercial preparations of human leukocyte-derived IL-2 were tested for the presence of contaminating IL-1 by affinity chromatography. Two samples from Electro-Nucleonics were found to contain significant amounts of IL-1, suggesting that IL-1 may contaminate preparations of leukocyte-derived IL-2.
mesh_terms: D001681:Biological Assay; D002846:Chromatography, Affinity; D006801:Humans; D007375:Interleukin-1 / Q000032:analysis*; D007376:Interleukin-2 / Q000032:analysis*
chemical_list: D007375:Interleukin-1; D007376:Interleukin-2