I5273 Sigma-Aldrich

Interleukin-5 human

recombinant, expressed in baculovirus infected Sf21 cells, ≥97% (SDS-PAGE), lyophilized powder, suitable for cell culture

Synonym: IL-5



Biochem/physiol Actions

IL-5 (interleukin-5) is a maturation and differentiation factor for eosinophils. Thus, it is associated with allergy and related disorders. IL-5 association with its receptor causes activation of MEK/ERK (mitogen activated protein kinase kinase/extracellular-regulated kinase), p38 MAPK (mitogen activated protein kinase) and JAK/STAT (Janus kinase/signal transducer and activator of transcription) pathways.

Interleukin-5 is a product of activated T lymphocytes and exhibits activity on eosinophils, B cells and thymocytes. Synonyms or biological activities attributed to IL-5 include: EDF (eosinophil differentiating factor), BCGF-II (B cell growth factor-II), TRF (T cell replacing factor), IgA-EF (IgA enhancing factor) and EO-CSF (eosinophil colony stimulating factor). Natural IL-5 is a 45-50 kDa dimeric glycoprotein, although glycosylation is not required for activity. Human and mouse IL-5 exhibit homology at the nucleotide and amino acid levels and show species cross-reactivity.

Physical form

Lyophilized from a 0.2 μm filtered solution in phosphate buffered saline containing 0.1 mg bovine serum albumin.

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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