IL-4, human recombinant

Alternate Names / Synonyms: BCGF, BCDF, B cell stimulating factor, BSF-1, Lymphocyte stimulatory factor 1, IL-4, MGC79402, Binetrakin, Pitrakinra.

Gene Symbol: IL4

Accession #: P05112

Gene ID: 3565

Gene Source: Human

Recombinant Host: E. coli

Appearance: Lyophilized protein

Physical Form: Sterile filtered and lyophilized with no additives

Molecular Weight: 15.0 kDa

Purity by SDS-PAGE: ≥98%

Purity by HPLC: ≥98%

Endotoxin Level: <0.1 ng/μg

Biological Activity: The EDâ‚…â‚€ as determined by the dose-dependent stimulation of human TF-1 cells is <0.2 ng/ml, corresponding to a specific activity of >5 x 106 units/mg.

Reconstitution: Reconstitute in water to a concentration of 0.1-1.0 mg/ml. The solution can then be diluted into other aqueous buffers and stored at 4°C for 1 week or –20°C for future use.

Storage Temp.: -20°C

Shipping: Blue ice

Background Information: IL-4 is a potent lymphoid cell growth factor that stimulates the growth and survivability of certain B cells and T cells. Human IL-4 is a 15.0 kDa globular protein containing 130 amino acid residues.

Handling: Centrifuge the vial prior to opening.