Human IL-5 Protein, His Tag

Interleukin 5 (IL5) is an interleukin produced by type-2 T helper cells and mast cells. IL-5 is a 115-amino acid (in human, 133 in the mouse) -long TH2 cytokine that is part of the hematopoietic family. Unlike other members of this cytokine family (namely interleukin 3 and GM-CSF), this glycoprotein in its active form is a homodimer. Interleukin-5 has long been associated with the cause of several allergic diseases including allergic rhinitis and asthma, wherein a large increase in the number of circulating, airway tissue, and induced sputum eosinophils have been observed. Given the high concordance of eosinophils and, in particular, allergic asthma pathology, it has been widely speculated that eosinophils have an important role in the pathology of this disease. Drugs that target IL-5 are mepolizumab and reslizumab.

Product Specifications

Background

Specifications

This protein carries a polyhistidine tag at the N-terminus. The protein has a calculated MW of 15.0 kDa. The protein migrates as 18-23 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.

Accession Number

P05113-1

Expression Region

Ile 20 - Ser 134

Host

HEK293

Target

IL-5

Conjugation

Unconjugated

Tag

N-10xHis

Source

Human

Stability

-20°C to -70°C for 12 months in lyophilized state; -70°C for 3 months under sterile conditions after reconstitution. For long term storage, the product should be stored at lyophilized state at -20°C or lower.

Endotoxin

0.1 EU per μg

Purity

90%

Bioactivity

Immobilized Human IL-5 Protein, His Tag (Cat. No. IL5-H52H3) at 5 μg/mL (100 μL/well) can bind Human IL-5 R alpha, Fc Tag (Cat. No. ILA-H5269) with a linear range of 0.6-10 ng/mL (QC tested).