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IFN λ1, 2, and 3 (also known as IL-29, IL-28A and IL-28B respectively) are distantly related to the IL-10 family and the interferons.? All three IFN-lambdas use a distinct receptor system composed of an IFN-λR1 subunit (also called CRF2-12) and IL-10R2 subunit (also called CRF2-14).? Signaling through this receptor system induces antiviral defenses similar to, but distinct from, that of type I interferons.? Recombinant human IFN-λ1 is a 19.8 kDa protein containing 178 amino acid residues.

Source: E.coli

Synonyms: IL-29

AA Sequence: PTSKPTTTGK GCHIGRFKSL SPQELASFKK ARDALEESLK LKNWSCSSPV FPGNWDLRLL QVRERPVALE AELALTLKVL EAAAGPALED VLDQPLHTLH HILSQLQACI QPQPTAGPRP RGRLHHWLHR LQEAPKKESA GCLEASVTFN LFRLLTRDLK YVADGNLCLR TSTHPEST

Purity: ≥ 98% by SDS-PAGE gel and HPLC analyses.

Biological Activity: Determined by its ability to activate STAT phosphorylation in an ISRE Luciferase Reporter Assay using human colon carcinoma COLO205 cells. The expected ED₅₀ is 0.2-0.5 ng/ml.