恺佧生物科技（上海）有限公司

表达区间及表达系统（Source）	Recombinant Biotinylated Human IL-21 Protein is expressed from E.coli with His tag and Avi tag at the N-Terminus. It contains Gln32-Ser162 [Accession \| Q9HBE4-1].
分子量大小（Molecular Weight）	The protein has a predicted MW of 18.30 kDa same as Bis-Tris PAGE result.
纯度（Purity）	> 95% as determined by Bis-Tris PAGE
内毒素（Endotoxin）	Less than 1EU per μg by the LAL method.
制剂（Formulation）	Lyophilized from 0.22 μm filtered solution in 20mM NaAc, 500mM NaCl (pH 5.5). Normally 8% trehalose is added as protectant before lyophilization.
重构方法（Reconstitution）	Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in 20mM NaAc, 500mM NaCl (pH 5.5).
存储（Storage）	-20 to -80°C for 12 months as supplied from date of receipt. -80°C for 3 months after reconstitution. Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.

表达区间及表达系统（Source）

Recombinant Biotinylated Human IL-21 Protein is expressed from E.coli with His tag and Avi tag at the N-Terminus.
It contains Gln32-Ser162 [Accession | Q9HBE4-1].

分子量大小（Molecular Weight）

The protein has a predicted MW of 18.30 kDa same as Bis-Tris PAGE result.

纯度（Purity）

> 95% as determined by Bis-Tris PAGE

内毒素（Endotoxin）

Less than 1EU per μg by the LAL method.

制剂（Formulation）

Lyophilized from 0.22 μm filtered solution in 20mM NaAc, 500mM NaCl (pH 5.5). Normally 8% trehalose is added as protectant before lyophilization.

重构方法（Reconstitution）

Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in 20mM NaAc, 500mM NaCl (pH 5.5).

存储（Storage）

-20 to -80°C for 12 months as supplied from date of receipt.
-80°C for 3 months after reconstitution.
Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.