Interleukin-5 protein (IL5) (Active), human, recombinant

Organism: Homo sapiens (Human). Source: E.Coli. Expression Region: 20-134aa. Protein Length: Full Length of Mature Protein. Tag Info: Tag-Free. Target Protein Sequence: M+IPTEIPTSAL VKETLALLST HRTLLIANET LRIPVPVHKN HQLCTEEIFQ GIGTLESQTV QGGTVERLFK NLSLIKKYID GQKKKCGEER RRVNQFLDYL QEFLGVMNTE WIIES. Purity: >98% as determined by SDS-PAGE. Endotoxin: Less than 1.0 EU/µg as determined by LAL method. Biological Activity: Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using human TF-1 cells is less than 0.1 ng/ml, corresponding to a specific activity of > 1.0 x 10^7 IU/mg. Form: Lyophilized powder. Buffer: Lyophilized from a 0.2 µm filtered 20mM PB, pH 7.5, 3 % trehalose, 0.1 % Tween-80. 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: Factor that induces terminal differentiation of late-developing B-cells to immunoglobulin secreting cells. Reference: n/a. Function: Factor that induces terminal differentiation of late-developing B-cells to immunoglobulin secreting cells.