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

HumanKine® recombinant human IL-9 protein


0.1-0.6 ng/mL EC50

Specific Activity

>2.00 x 106 IU/mg

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(Primary) 0.1-0.6 ng/mL EC50
Specific Activity>2.00 x 106 IU/mg
Purity >95%
Endotoxin<1 EU/μg
Accession NumberP15248
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 StorageProduct FormTemperature ConditionsStorage Time
(From Date of Receipt)
Lyophilized-20°C to -80°CUntil Expiry Date
LyophilizedRoom Temperature2 weeks
Reconstituted as per CofA-20°C to -80°C6 months
Reconstituted as per CofA4°C1 week
Avoid repeated freeze-thaw cycles.
Reconstitution Briefly centrifuge the vial before opening. It is recommended to reconstitute the protein in sterile 1xPBS pH 7.4 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




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

Authors - Vincenzo Calvanese

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