title: An efficient method for purification of human T-cell growth factor.
abstract: A 1000-fold purification of human T-cell growth factor (TCGF) was achieved starting from supernatants of human spleen cells stimulated with phytohaemagglutinin (PHA) in culture medium containing 0.5% serum. The purification scheme involved precipitation with ammonium sulphate, gel filtration and blue-Sepharose chromatography. The use of polyethylene glycol 6000 (PEG 6000) was critical during the chromatographic steps in order to obtain high final recoveries or activity (40-50%). Purified preparations of TCGF labelled with 125I by the chloramine T method revealed that the activity co-migrated with 2 molecular species of 14,000-17,000 daltons in SDS-PAGE under non-reducing conditions.
mesh_terms: D000818:Animals; D002460:Cell Line; D011232:Chemical Precipitation; D002847:Chromatography, Agarose; D002850:Chromatography, Gel; D003470:Culture Media; D003956:Dialysis; D004591:Electrophoresis, Polyacrylamide Gel; D006801:Humans; D007376:Interleukin-2 / Q000302:isolation & purification*; D051379:Mice; D013154:Spleen / Q000166:cytology / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology
chemical_list: D003470:Culture Media; D007376:Interleukin-2