Interleukin-4 (IL4) (Active), recombinant human

Organism: Homo sapiens (Human). Source: Mammalian cell. Expression Region: 25-153aa. Protein Length: Full Length of Mature Protein. Tag Info: C-terminal 10xHis-tagged. Target Protein Sequence: HKCDITLQEI IKTLNSLTEQ KTLCTELTVT DIFAASKNTT EKETFCRAAT VLRQFYSHHE KDTRCLGATA QQFHRHKQLI RFLKRLDRNL WGLAGLNSCP VKEANQSTLE NFLERLKTIM REKYSKCSS. Purity: Greater than 90% as determined by SDS-PAGE. Endotoxin: Less than 1.0 EU/ug as determined by LAL method. Biological Activity: The ED50 as determined by the dose-dependent stimulation of the proliferation of TF-1 cells is 1.864-4.949 ng/mL. Form: Lyophilized powder. Buffer: Lyophilized from a 0.2 µm filtered PBS, 6% Trehalose, pH 7.4. Reconstitution: We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference. Storage: The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C. Notes: Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week. Relevance: Cytokine secreted primarily by mast cells, T-cells, eosinophils, and basophils that plays a role in regulating antibody production, hematopoiesis and inflammation, and the development of effector T-cell responses . Reference: An IL-4 signalling axis in bone marrow drives pro-tumorigenic myelopoiesis. LaMarche N.M., Hegde S., Park M.D., Maier B.B., Troncoso L., Le Berichel J., Hamon P., Belabed M., Mattiuz R., Merad M. Nature 625:166-174 (2024). Function: nan