Purity > 90% as determined by SDS-PAGE. MW: 17.4kDa. Full Length of Mature Protein: 21-153aa. N-terminal 6xHis-tagged. Homo sapiens (Human). Produced by T-cells in response to antigenic or mitogenic stimulation, this protein is required for T-cell proliferation and other activities crucial to regulation of the immune response. Can stimulate B-cells, monocytes, lymphokine-activated killer cells, natural killer cells, and glioma cells.