R&D Systems™ Recombinant Human IL-4 Protein

Extensive quality control produces industry leading bioactivity and lot-to-lot consistency that instills confidence in results and ensures reproducibility. Applications: Bioactivity

Brand:  R&D Systems™ 204-IL-001MG/CF

Product Code. 18707717

Description

Measured in a cell proliferation assay using TF-1 human erythroleukemic cells. Kitamura, T. et al. (1989) J. Cell Physiol. 140:323. The ED50 for this effect is 0.05-0.2 ng/mL.

Specifications

• Formulation: Lyophilized from a 0.2μm filtered solution in PBS.
• Molecular Weight (g/mol): 15 kDa
• Quantity: 1 mg
• Storage Requirements: Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20 to -70° C as supplied. 1 month, 2 to 8° C under sterile conditions after reconstitution. 3 months, -20 to -70° C under sterile conditions after reconstitution.
• Gene Alias: B cell growth factor 1, BCDF, B-cell stimulatory factor 1, BCGF1, BCGF-1, binetrakin, BSF1, BSF-1, IL4, IL-4B_cell stimulatory factor 1, IL4E12, interleukin 4, interleukin-4, Lymphocyte stimulatory factor 1, MGC79402, Pitrakinra
• Recombinant: Recombinant

• Gene ID (Entrez): 3565
• Name: IL-4
• Source: E. coli-derived human IL-4 protein His25-Ser153,with an N-terminal Met
• Endotoxin Concentration: <0.1 EU per 1μg of the protein by the LAL method.
• Conjugate: Unconjugated
• Purity or Quality Grade: 97%, by SDS-PAGE under reducing conditions and visualized by silver stain.