Abbreviation
Recombinant Human IL31 protein (Active)
Purity
>97% 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 specific activity is determined by inducing STAT3 activation using human U-87 MG cells. 5 ng/mL of rHuIL-31 can effectively induce STAT3 activation.
Alternative Names
IL 31; IL-31; IL31; IL31_HUMAN; Interleukin 31; Interleukin-31
Species
Homo sapiens (Human)
Expression Region
24-164aa
Target Protein Sequence
SHTLPVRLLR PSDDVQKIVE ELQSLSKMLL KDVEEEKGVL VSQNYTLPCL SPDAQPPNNI HSPAIRAYLK TIRQLDNKSV IDEIIEHLDK LIFQDAPETN ISVPTDTHEC KRFILTISQQ FSECMDLALK SLTSGAQQAT T
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 µm filtered PBS, pH7.4
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
IL-31 is a key pruritogenic and pro-inflammatory cytokine that signals through the IL-31RA/OSMR heterodimer to drive JAK/STAT, MAPK, and PI3K pathways implicated in atopic dermatitis, pruritus, and airway hypersensitivity. This tag-free recombinant human IL-31 encompasses the full mature sequence (residues 24–164) and demonstrates robust signaling potency, effectively inducing STAT3 activation in human U-87 MG cells at just 5 ng/mL — a level of activity that supports use in cell-based functional assays such as STAT3 phosphorylation readouts, keratinocyte or neuronal activation studies, and in vivo models of itch and allergic inflammation. Endotoxin levels below 1.0 EU/μg minimize LPS-driven artifacts in sensitive immune cell experiments, making this protein appropriate for antibody development workflows, ELISA standard curves, and signaling pathway dissection. Purity exceeding 97% by SDS-PAGE, combined with this stringent endotoxin control, satisfies the quality thresholds commonly required for quantitative receptor-binding and dose–response studies.