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- W2043067148 abstract "Two T-cell chemotactic factors, lymphocyte chemotactic factor (LCF) and interleukin 2 (IL-2), were separated and characterized from culture supernatants of concanavalin A-stimulated human peripheral blood mononuclear cells. LCF was purified approximately 7800-fold to homogeneity from culture supernatant using gel filtration and high-performance liquid chromatography (HPLC). LCF was found to he distinct from both IL-2 and interleukin-1. Sephadex G-100 gel filtration of crude supernatants from concanavalin A-stimulated mononuclear cells showed two molecular weight regions of T lymphocyte chemotactic activity. A 10,000- to 25,000-Da region contained both IL-2 and LCF and a 45,000- to 75,000-Da region contained only a high molecular weight form of LCF. Both high and low molecular weight species of LCF eluted with 40–44% acetonitrile from a reversed-phase C18 HPLC column. IL-2 present only in the low molecular weight region eluted from the C18 column with 65–75% acetonitrile. The migration of T lymphocytes to IL-2 was totally inhibited by anti-interleukin 2 receptor antibody while the response of T cells to LCF was unaffected. LCF eluting off the C18 column was purified to homogeneity by two subsequent cycles of gel filtration HPLC. The resultant protein showed a single band by sodium dodecyl sulfate-polyacrylamide gel electrophoresis corresponding to a molecular weight of 10,500. The data presented here demonstrate that IL-2 and LCF are distinct lymphocyte chemotactic factors and although they are not readily separable from crude supernatants by molecular sieve chromatography, they can easily be distinguished by reversed-phase HPLC." @default.
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- W2043067148 date "1987-03-01" @default.
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- W2043067148 title "Separation and purification of lymphocyte chemotactic factor (LCF) and interleukin 2 produced by human peripheral blood mononuclear cells" @default.
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- W2043067148 doi "https://doi.org/10.1016/0008-8749(87)90051-7" @default.
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