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  • HEK293 expressed
  • Endotoxin-free
  • Animal-component free

HumanKine® recombinant human IL-9 protein


Typically ≤ 1 ng/mL EC50

Species Reactivity




Cat no : HZ-1240


Cytokine P40, HP40, IL 9, IL9, IL-9, interleukin 9, P40, T cell growth factor P40

Technical Specifications

GeneID 3578
Species human
Expression HEK293
Activity Typically ≤ 1 ng/mL EC50
Purity >95%
Endotoxin<1 EU/μg
Molecular Mass 38 to 48 kDa, monomer, glycosylated
Formulation 1x PBS, See Certificate of Analysis for details
Species Reactivity human

Stability and Reconstitution

Stability and Storage Lyophilized proteins are stable for 1 year from the date of receipt if stored between (-20°C) and (-80°C). Upon reconstitution we recommend that the solution can be stored at (4°C) for short term or at (-20°C) to (-80°C) for long term. Repeated freeze thaw cycles should be avoided with reconstituted products.
Reconstitution Briefly centrifuge the vial before opening. It is recommended to reconstitute the protein in sterile 1xPBS containing 0.1% endotoxin-free recombinant human serum albumin (HSA).


Interleukin 9 (IL-9) is a γc-family cytokine produced by T-helper 9 (Th9) cells. IL-9 promotes the survival and activation of various cellular targets, including mast cells, B cells, T cells, and structural cells. Its expression is considered a hallmark of Th2-lineage cells. Primarily studied in Th2-type immunity, IL-9 was shown to be involved in asthma, allergy, and host defense against helminth infections. IL-9 also stimulates cell proliferation and prevents apoptosis. It functions through the its cognate receptor (IL9R), which activates different signal transducer and activator proteins to execute various biological processes (PMID: 29703631; 29437190; 29392411; 29391143)


Cytokine P40, HP40, IL 9, IL9, IL-9, interleukin 9, P40, T cell growth factor P40



J Toxicol Sci

Human induced pluripotent stem cell-derived mast cells useful for in vitro mast cell activation assay exhibiting phenotypes and morphological characteristics of human mast cells.

Authors - Tatsuya Ikuno


MLLT3 governs human haematopoietic stem-cell self-renewal and engraftment.

Authors - Vincenzo Calvanese