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Recombinant Human IL22

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Product Source Size Cat. No. Price
Recombinant Human IL22 E. coli10 µg Z100945 $70.00
100 µg Z100947 $390.00
1.0 mg Z100949 $2,900.00
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Data Sheet
Print Version
Alternative Names IL-22, IL-TIF, Cytokine Zcyto18, IL-10-related T cell-derived-inducible factor, ILTIF, ZCYTO18
Recombinant Human Interleukin-22 (IL22)
Description Originally identified as a gene induced by IL-9 in mouse T cells and mast cells, IL-22 is a member of the IL-10 family of cytokines. IL-22 inhibits IL-4 production by Th2 cells, and induces acute phase reactants in the pancreas and liver. The IL-22 receptor complex consists of two receptor subunits, IL-22R and IL-10R-beta that belong to the class II cytokine receptor family. Recombinant human IL-22 is a non-disulfide-linked homodimeric protein.
Gene Symbol IL22
Gene ID 50616
Accession No. Q9GZX6
Source E. coli
Appearance Lyophilized Powder
Molecular Weight 17.0 kDa
Endotoxin Level <1.0 EU/μg of recombinant protein as determined by the LAL method.
Purity >95% as determined by SDS-PAGE
Gel Image Click To Enlarge
Bioactivity Activity was determined by the ability to inhibit growth of human A549 cancer cells at concentrations ranging between 50-100 ng/mL.
Bioactivity Data Click To Enlarge
Formulation Recombinant Interleukin-22 was lyophilized from 0.2 μm filtered concentrated (1.0 mg/mL) solution in 500 mM NaCl, 20 mM Tris, pH 8.0.
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 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.