别名（Synonyms）

Interleukin-21, IL-21, Za11

编号（Uniprot No.）

Q9HBE4

表达系统（Source）

HEK293 cells-derived human IL-21 protein, Gln30-Ser162, with N-terminal Flag tag.

分子量大小（Molecular Weight）

The protein has a predicted MW of 16.5 kDa. And it migrates as 19 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

纯度（Purity）

> 95% as determined by SDS-PAGE.

内毒素（Endotoxin）

< 0.1 EU per 1μg of the protein by the LAL method.

制剂（Formulation）

Lyophilized from a 0.2 μm filtered concentrated solution in PBS.

复溶（Reconstitution）

Centrifuge tubes before opening. Dissolve lyophilized protein with PBS. Recommend to aliquot the protein into smaller quantities when first used and avoid repeated freeze-thaw cycles.