Abbreviation
Recombinant Mouse Il21 protein (Active)
Purity
>98% as determined by SDS-PAGE.
Endotoxin
Less than 1.0 EU/μg as determined by LAL method.
Activity
Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using human N1186 T cells is less than 25 ng/ml, corresponding to a specific activity of >4.0x104 IU/mg.
Alternative Names
Il21Interleukin-21; IL-21
Species
Mus musculus (Mouse)
Expression Region
18-146aa
Target Protein Sequence
HKSSPQGPDR LLIRLRHLID IVEQLKIYEN DLDPELLSAP QDVKGHCEHA AFACFQKAKL KPSNPGNNKT FIIDLVAQLR RRLPARRGGK KQKHIAKCPS CDSYEKRTPK EFLERLKWLL QKMIHQHLS
Note: The complete
sequence may include tag sequence, target protein sequence, linker sequence and extra sequence that is
translated with the protein sequence for the purpose(s) of secretion, stability, solubility, etc.
If the exact amino acid sequence of this recombinant protein is critical to your application,
please explicitly request the full and complete sequence of this protein before ordering.
Protein Length
Full Length of Mature Protein
Tag Info
Tag-Free
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Buffer
Lyophilized from a 0.2 m filtered 2 × PBS, pH 7.4
Lead Time
5-10 business days
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Notes
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Datasheet & COA
Please contact us to get it.
Description
Interleukin-21 plays a central role in T cell, B cell, and NK cell regulation, making precise recombinant forms essential for dissecting JAK/STAT3 and MAPK signaling cascades in murine immune models. This tag-free recombinant mouse IL-21 encompasses the full mature sequence (18–146 aa) and demonstrates strong signaling potency, with an ED50 below 25 ng/ml in a human N1186 T cell proliferation assay corresponding to a specific activity exceeding 4.0 × 10⁴ IU/mg — providing a reliable reference standard for cytokine detection assays and a functional driver for T and B cell proliferation, differentiation, and activation studies. Endotoxin levels below 1.0 EU/μg minimize LPS-driven artifacts, which supports use in sensitive primary immune cell cultures and in vivo murine models of inflammation or tumor biology. Purity exceeding 98% by SDS-PAGE, combined with this endotoxin profile, aligns with standards expected in antibody development workflows including use as a coating antigen or ELISA positive control.