- BP000169-C053: Recombinant Human Interleukin-31 (IL-31) Protein 
 
 Source: E. coli-derived.
 Purity: > 95% by SEC-HPLC and reducing SDS-PAGE.
 Endotoxin: < 0.1 ng/ug (1 IEU/ug).
- BP000154-CYT-625: Recombinant Human Interleukin 31 (IL-31) Protein 
 
 Source: E. coli-derived.
 The ED50 was determined by its ability to activate STAT following receptor ligand interaction and found to be <5 ug/ml, corresponding to a specific activity of 200,000 units.
 Purity: > 95% by SDS-PAGE and RP-HPLC.
- BP000169-CYT-604: Recombinant Mouse Interleukin-31 (IL-31) Protein 
 
 Source: E. coli-derived.
 Purity: > 97% by SDS-PAGE and RP-HPLC.