白介素2即白细胞介素-2（interleukin-2，IL-2），又名T细胞生长因子(T cell growth factor，TCRF)。主要由活化的CD4+T细胞和CD8+T细胞产生的具有广泛生物活性的细胞因子。是所有T细胞亚群的生长因子，能使T细胞在试管内长期存活，并可促进活化B细胞增殖，故为调控免疫应答的重要因子，也参与抗体反应、造血和肿瘤监视。 

本产品由真核细胞表达的重组蛋白，是将蛋白基因接入稳定表达载体，转化CHO-K1细胞，经克隆筛选，质量验证，挑选的稳定表达株，由化学成分确定的培养基（不含有任何动物源成分）发酵制备，工艺稳定，保证了产品质量及批次间的一致性。

本产品为无菌冻干粉剂，由含有 10mM 磷酸盐pH为 7.2的蛋白溶液经0.2μm过滤后分装冻干。

Purity

≥95% (SDS-PAGE, SEC-HPLC) 

Additional sequence information

133 amino acids

Function

Interleukin-2, or interleukin-2, is also known as T cell growth factor (TCRF). A wide range of bioactive cytokines produced primarily by activated CD4+T cells and CD8+T cells. It is a growth factor of all T cell subsets, which can make T cells survive in vitro for a long time and promote the proliferation of activated B cells. Therefore, it is an important factor in the regulation of immune response, and also involved in antibody response, hematopoietic and tumor surveillance.

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.

This product is a recombinant protein expressed by eukaryotic cells. The protein gene was inserted into stable expression vector and transformed into CHO-K1 cells. After cloning, screening and quality verification, the selected stable expression strain was prepared by fermentation of the medium determined by chemical composition (without any animal source components).

This product is a sterile lyophilized powder, made from a protein solution containing 10mM phosphate with a pH of 7.2 filtered by 0.2μm.