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Proteins of this family play an important role in inducing non-specific resistance against a broad range of viral infections.? They also affect cell proliferation and modulate immune responses.? Produced by peripheral blood leukocytes and lymphoblastoid cells, IFN-α is an acid-stable molecule that signals through IFN-α/βR, which is also used by IFN-β.? Both IFNs have similar anti-viral activity and regulate expression of MHC class I antigens.? IFN-α contains four highly conserved cysteine residues that form two disulfide bonds, one of which is necessary for biological activity.? PeproTech’s Recombinant Human IFN-β is a 20.0 kDa protein containing 166 amino acid residues. Due to glycosylation, IFN-β has an approximate MW of 22.3 kDa based on SDS-PAGE gel and Mass Spectrometry.

Manufactured using all Animal-Free reagents.

Source: E.coli

Synonyms: Leukocyte interferon, B cell interferon, Type I interferon

AA Sequence: MSYNLLGFLQ RSSNFQCQKL LWQLNGRLEY CLKDRMNFDI PEEIKQLQQF QKEDAALTIY EMLQNIFAIF RQDSSSTGWN ETIVENLLAN VYHQINHLKT VLEEKLEKED FTRGKLMSSL HLKRYYGRIL HYLKAKEYSH CAWTIVRVEI LRNFYFINRL TGYLRN

Purity: ≥ 95% by SDS-PAGE gel and HPLC analyses.

Biological Activity: Determined by its ability to stimulate the proliferation of human TF-1 cells. The expected ED₅₀ is ≤ 0.25 ng/ml, corresponding to a specific activity of ≥ 4 x 10⁶ units/mg.