Source:

Escherichia coli.

Molecular Weight:

26.0 kDa, observed by non-reducing SDS-PAGE.

Purity:

> 95% by SDS-PAGE analysis.

Biological activity:

ED50 < 0.4 ng/mL, measured by a cell proliferation assay using TF-1 Cells, corresponding to a specific activity of > 2.5× 10ˆ6 units/mg.

AA Sequence:

MEIPMSTVV KETLIQLSTH RALLTSNETM RLPVPTHKNH QLCIGEIFQG LDILKNQTVR GGTVEILFQN LSLIKKYIDG QKEKCGEERR KTRHFLDYLQ EFLGVMSTEW AMEV

Endotoxin:

< 0.2 EU/μg, determined by LAL method.

Formulation:

Lyophilized after extensive dialysis against 20mM Tris, pH8.5.

Background:

Interleukin-5 (IL-5), produced by mast cells, T cells and eosinophils, is responsible for the activities attributed to eosinophil differentiating factor, B cell growth factor II and T cell-replacing factor (TRF). It can increase production and mobilization of eosinophils and CD34+ progenitors from the bone marrow. IL-5 plays an important role in inducing cell-mediated immunity against parasitic infections and certain tumors. IL-5 also promotes differentiation of basophils and primes them for histamine and leukotriene release.Recombinant rat Interleukin-5 (rrIL-5) produced in E.coli is a disulfide-linked homodimer containing two non-glycosylated polypeptide chains of 113 amino acids each. A fully biologically active molecule, rrIL-5 has a molecular mass of 26.0 kDa analyzed by non-reducing SDS-PAGE and is obtained by proprietary chromatographic techniques at GenScript.

Usage:

This material is offered by USA Bioworld biotech for research, laboratory or further evaluation purposes. For research use only.

Physical Appearance:

Sterile Filtered White lyophilized (freeze-dried) powder.

Reconstitution:

Reconstituted in ddH2O at 100 μg/mL.

Storage:

Lyophilized recombinant rat Interleukin-5 (rrIL-5) remains stable up to 6 months at -80°C from date of receipt. Upon reconstitution, rrIL-5 should be stable up to 2 weeks at 4°C or up to 3 months at -20°C.