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J Immunol. 1987 Mar 15;138(6):1813-6.

Species-specificity of T cell stimulating activities of IL 2 and BSF-1 (IL 4): comparison of normal and recombinant, mouse and human IL 2 and BSF-1 (IL 4).


Mouse and human interleukin 2 (IL 2) both cause proliferation of T cells of the homologous species at high efficiency. Human IL 2 also stimulates proliferation of mouse T cells at similar concentrations, whereas mouse IL 2 stimulates human T cells at a lower (sixfold to 170-fold) efficiency. In contrast, the T cell stimulating activities of mouse and human B cell stimulatory factor 1 (interleukin 4; IL 4) appear to be species specific over the range of concentrations tested; we detected no activity of mouse IL 4 on human T cells, or human IL 4 on mouse T cells.

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