Isolation and partial characterization of human T-cell growth factor.
Human T-cell growth factor (TCGF) has been isolated from conditioned media of the Jurkat T-leukemia cell line. Using a high-efficiency isolation procedure involving hollow fiber concentration, gel filtration and 3 steps of reverse-phase HPLC we obtained 100 to 600 pmol TCGF per liter of conditioned medium. Jurkat cell-derived TCGF (jTCGF) has a molecular weight of 15,750. The amino acid composition of jTCGF agrees well with that derived from the cDNA sequence coding for this protein (Taniguchi et al, Nature 302, 305, 1983). jTCGF is highly active in vitro in stimulating the proliferation of T-cells as measured by 3H-thymidine incorporation into DNA (half-maximal stimulation with 3 fmol/100 microliters well).
D000596:Amino Acids / Q000032:analysis; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D007376:Interleukin-2 / Q000302:isolation & purification*; D007938:Leukemia / Q000032:analysis
D000596:Amino Acids; D007376:Interleukin-2