ProDots Recombinant Human IL-4 Protein Summary
Pre-aliquoted, lyophilized protein dots for use in cell culture mediumFeatures and Benefits
- Rolls out of bottle for easy cell culture medium preparation
- Eliminates time spent aliquoting
- One protein dot can be used to make 500 mL of 10 ng/mL cell culture medium
The ED50 for this effect is 0.05-0.2 ng/mL.
His25 - Ser153, with an N-terminal Met
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Reconstitution||For a stock solution, reconstitute at 100-200 μg/mL in PBS containing ≥ 0.1% human or bovine serum albumin, or simply roll ProDot® directly into cell culture medium for immediate use.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
• 6 months from date of receipt at room temperature as supplied.
• 12 months from date of receipt at 2-8 °C as supplied.
• 1 month at 2-8 °C under sterile conditions after reconstitution.
• 3 months at -20 to -70 °C under sterile conditions after reconstitution
ProDots®Recombinant Human IL-4 stimulates cell proliferation of the TF-1 human erythroleukemic cell line. The ED50for this effect is 0.05-0.2 ng/mL.
1 μg/lane of ProDots®Recombinant Human IL-4 was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized with silver staining, showing a single band at approximately 14 kDa.
IL-4 (Interleukin-4) is a cytokine that is primarily expressed by Th2-biased CD4+ T cells, mast cells, basophils, and eosinophils. It promotes cell proliferation, survival, and immunoglobulin class switch to IgG4 and IgE in human B cells, acquisition of the Th2 phenotype by naïve CD4+ T cells, priming and chemotaxis of mast cells, eosinophils, and basophils, and the proliferation and activation of epithelial cells. IL-4 plays a dominant role in the development of allergic inflammation and asthma. The type I receptor for IL-4, which is expressed on hematopoietic cells, is a heterodimer of the ligand binding IL-4 R? and the common ? chain (a shared subunit of the receptors for IL-2, -7, -9, -15, and -21). The type II receptor on nonhematopoietic cells consists of IL-4 R? and IL-13 R?1. The type II receptor also transduces IL-13 mediated signals.
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