Background
IL-20 is a member of the IL-10 family of regulatory cytokines which includes IL-10, IL-19, IL-20, IL-22, IL-24 and IL-26. Members of this family share partial homology in their amino acid sequences but they are dissimilar in their biological functions. IL-20 is a hematopoietic growth factor capable of stimulating colony formation by CD34+ multipotential progenitors, but not by other progenitor cells. IL-20 signals through a receptor system composed of type I IL-20R-α and type II IL-20R-β. Over-expression of IL-20 in keratinocytes expressing both receptor subunits has been implicated in the induction of inflammatory skin disease. Recombinant human IL-20 is a 35.2 kDa homodimeric protein consisting of two 153 amino acid polypeptide chains.
Specifications
Preparation
Biological activity was determined by its ability to activate STAT following receptor ligand interaction.
Location
MLKTLNLGSC VIATNLQEIR NGFSEIRGSV QAKDGNIDIR ILRRTESLQD TKPANRCCLL RHLLRLYLDR VFKNYQTPDH YTLRKISSLA NSFLTIKKDL RLCHAHMTCH CGEEAMKKYS QILSHFEKLE PQAAVVKALG ELDILLQWME ETE
Source
E. coli
Reactivity
n/a
Tested Application
n/a
Storage
The lyophilized IL-20 recombinant protein is stable for at least 2 years from date of receipt at -20ËšC. Reconstituted IL-20 is stable for at least 3 months when stored in working aliquots with a carrier protein at -20ËšC. As with any protein, exposing IL-20 recombinant protein to repeated freeze / thaw cycles is not recommended. When working with proteins care should be taken to keep recombinant protein at a cool and stable temperature.
Species Reactivity
n/a
Purity
Greater than 98% by SDS-PAGE gel and HPLC analyses.
Endotoxin level is less than 0.1 ng per μg (1EU/μg).
