Abbreviation
Recombinant Human IL2 protein (Active)
Purity
Greater than 95% as determined by SDS-PAGE.
Endotoxin
Less than 1.0 EU/ug as determined by LAL method.
Activity
The ED50 as determined by the dose-dependent stimulation of the proliferation of CTLL-2 cells is 1.725-2.239 ng/mL.
Alternative Names
Interleukin-2; IL-2; T-cell growth factor (TCGF); Aldesleukin; IL2
Species
Homo sapiens (Human)
Expression Region
21-153aa
Target Protein Sequence
APTSSSTKKTQLQLEHLLLDLQMILNGINNYKNPKLTRMLTFKFYMPKKATELKHLQCLEEELKPLEEVLNLAQSKNFHLRPRDLISNINVIVLELKGSETTFMCEYADETATIVEFLNRWITFCQSIISTLT
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
C-terminal 10xHis-tagged
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.
Form
Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer
Lyophilized from a 0.2 μm sterile filtered PBS, 6% Trehalose, pH 7.4
Reconstitution
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Storage Condition
Store at -20°C/-81°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Lead Time
3-7 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℃ for up to one week.
Shelf Life
The shelf life is related to many factors, storage state, storage temperature and the stability of the product itself. Generally, the shelf life of lyophilized form is 6 months at -20°C/-80°C from the date of receipt.
Datasheet & COA
Please contact us to get it.
Images
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(Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
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Activity
The ED50 as determined by the dose-dependent stimulation of the proliferation of CTLL-2 cells is 1.725-2.239 ng/mL.
Description
IL-2 drives clonal expansion and effector differentiation of activated T cells through JAK/STAT5 signaling, making precise control of its bioactivity essential for dissecting immune responses in vitro and in vivo. This mammalian-expressed protein, spanning the full mature sequence (aa 21–153), demonstrates potent proliferative activity with an ED50 of 1.725–2.239 ng/mL in CTLL-2 cells, directly supporting dose-response studies in T-cell proliferation assays, STAT5 phosphorylation kinetics, and primary PBMC activation experiments. Endotoxin levels below 1.0 EU/μg eliminate LPS-driven artifacts that confound cytokine-specific readouts in immune cell cultures, satisfying the purity and endotoxin criteria typical for mechanistic signaling studies and tumor immunology models. The >95% purity and C-terminal His tag enable reproducible quantification in ELISA development, antibody validation workflows, and as a reference standard in multiplex cytokine panels.