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Recombinant Rat IL20

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Product Source Size Cat. No. Price
Recombinant Rat IL20 E. coli10 µg Z300165 $130.00
1.0 mg Z300169 $3,800.00
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Data Sheet
Print Version
Alternative Names IL-20
Recombinant Rat Interleukin-20 (IL20)
Description IL-19 and IL-20 are mainly produced by activated monocytes , IL-24 is produced by Th2 cells, monocytes, and melanocytic cells , and IL-22 and IL-26 are primarily produced by activated T cells. Like IL-10, these class II cytokines signal through heterodimeric receptors. Overexpression of IL-20 in transgenic mice causes neonatal death as well as skin abnormalities, including aberrant epidermal differentiation. IL-20 selectively enhances multipotential hematopoietic progenitors in vitro and in vivo. IL-20 is preferentially expressed in monocytes18 and induces STAT 3 activation through binding to 2 types of IL-20 receptor (R) complexes, either IL- 20R1/IL-20R2 or IL-22R1/IL- 20R2
Gene Symbol IL20
Gene ID 681112
Accession No. B8K1Y1
Source E. coli
Appearance Lyophilized Powder
Molecular Weight 16.0 kDa
Endotoxin Level <1.0 EU/μg of recombinant protein as determined by the LAL method.
Purity >95% as determined by SDS-PAGE
Bioactivity The ED(50) was determined by by a cell proliferation assay using human IL-20R-alpha and human IL-20R-beta co-transfected murine BaF3 pro-B cells, and was found to be less than 0.6 ng/mL, corresponding to a specific activity of 1.7 x 10^6 IU/mg.
Formulation Recombinant Rat Interleukin-20 was lyophilized from a 0.2 μm filtered PBS solution pH 7.5.
Reconstitution A quick spin of the vial followed by reconstitution in distilled water to a concentration not less than 0.1 mg/mL. This solution can then be diluted into other buffers.
Storage The lyophilized protein is stable for at least one year from date of receipt at -70°C. Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.
Usage For research use only. Not for diagnostic or therapeutic use.
Product Documents
Product References
FAQs
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How are endotoxin levels measured?
1. For estimating the endotoxin levels; we use the LAL (Limulus Amebocyte Lysate) method: The lysate from horseshoe crab amebocytes clots in the presence of very low endotoxin. This reaction is the basis of the Limulus amebocyte lysate (LAL) assay which was approved by the FDA in 1970.

· Endotoxin is generally measured in Endotoxin Units per milliliter (EU/mL).

· For recombinant proteins: EU is reported per microgram of protein.

· One EU = 0.1-0.2 ng endotoxin/µg of protein.

· At abm, we do the LAL chromogenic assays that can detect down to 0.01 EU/ml.
With regard to the BSA levels in some Growth Factors and Cytokines, can you please provide an explanation as to why they are so high?
The amount of BSA, as part of the formulation of a protein, can vary considerably depending on how much BSA was deemed optimum/necessary for protein stability in combination with /in-lieu of - other possible additives. The aforementioned formulations are somewhat analogous to the “carrier” versions of many formulations from “R and D systems” that have as high as 50 µg of BSA per µg of the recombinant protein product. If, needed or desired, abm scientists can substitute BSA for other stabilizing additives for most formulations.
Are your Escherichia coli sourced growth factors: 1) Human derived materials free? 2) Recombinant proteins free?
Yes, all of abm's growth factors made in Escherichia coli using recombinant technology contain no human derived-products or other recombinant proteins. In the rare cases of BSA presence, this will be mentioned in the product's formulation.