描述（Description）
IL-21 protein is an immunomodulatory cytokine that promotes the transition from innate immunity to adaptive immunity. It induces B cells to produce IgG(1) and IgG(3), harnessing an effective antibody response to fight viral infections. GMP IL-21 Protein, Human is the recombinant human-derived IL-21 protein, expressed by E. coli , with tag free.
純度（Purity）
≥95%, by SDS-PAGE (under reducing (R) & Non-reducing conditions, visualized by Coomassie staining)
氨基酸序列（Target Protein Sequence）
HKSSSQGQDRHMIRMRQLIDIVDQLKNYVNDLVPEFLPAPEDVETNCEWSAFSCFQKAQLKSANTGNNERIINVSIKKLKRKPPSTNAGRRQKHRLTCPSCDSYEKKPPKEFLERFKSLLQKMIHQHLSSRTHGSEDS
制劑（Trait）
Lyophilized from a 0.2 μm filtered solution of 20 mM PB, 150 mM NaCl, pH 7.0
復溶（Reconstitution）
It is recommended to redissolve in sterile deionized water.
保存條件&效期（Storage & Stability）
Stored at -20°C for 1 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.Please avoid repeated freeze-thaw cycles.
運輸方式(Shipping)
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
生物活性（Bioactivity）
Measured by its ability to enhance IFN-gamma secretion in NK-92 human natural killer lymphoma cells. The ED50 for this effect is ≤ 20 ng/mL. The bioactivity of recombinant Human IL21 is higher than the other competing product.
電泳（SDS-PAGE）
Human Activin A Protein, Tag Free on SDS-PAGE under reducing (R) and non-reducing (NR) conditions. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95%.
特別提示：本公司的所有產(chǎn)品僅用于工業(yè)應用或者科學研究等非醫(yī)療目的,不可用于人類或動物的臨床診斷或者治療,非藥用,非食用。
關(guān)鍵字： GMP級;高純度;批間一致;生物活性;科研專供;
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蘇州豐度依托先進技術(shù)平臺，打造成熟生產(chǎn)體系，嚴控基因工程設(shè)計、細胞培養(yǎng)、蛋白純化等環(huán)節(jié)，優(yōu)化工藝與管理，確保產(chǎn)品高純度、高活性且批間一致。產(chǎn)品覆蓋基礎(chǔ)研究、生物醫(yī)藥研發(fā)等多領(lǐng)域，為科研及生產(chǎn)提供多樣、適配產(chǎn)品，助力突破技術(shù)難題 。