Recombinant Human Interferon-α2b/IFN-α2b
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Catalog#C005
SourceE. coli
DescriptionRecombinant Human Interferon-α2b produced in E. coli is a single non-glycosylated polypeptide chain containing 166 amino acids with a molecular mass of 19,400 Daltons. The Interferon-α2b gene was obtained from human leukocytes.
NamesInterferon Alpha-2, IFN-Alpha-2, Interferon Alpha-A, LeIF A, IFNA2
Accession #P01563
FormulationLyophilized from a 0.2 μM filtered solution of 20mM PB, 150mM NaCl, pH 7.2
ShippingThe product is shipped at ambient temperature.
ReconstitutionAlways centrifuge tubes before opening. Do not mix by vortex or pipetting.
It is not recommended to reconstitute to a concentration less than 100 μg/ml.
Dissolve the lyophilized protein in 1X PBS.
Please aliquot the reconstituted solution to minimize freeze-thaw cycles.
StorageLyophilized protein should be stored at < -20°C, though stable at room temperature for 3 weeks.
Reconstituted protein solution can be stored at 4-7°C for 2-7 days.
Aliquots of reconstituted samples are stable at < -20°C for 3 months.
Biological ActivitySpecific Activity is greater than 1.0 x 108 IU/ mg as determined by a viral resistance assay using VSV-WISH cells.
PurityGreater than 95% as determined by RP-HPLC and reducing SDS-PAGE.
EndotoxinLess than 0.1 ng/μg (1 IEU/μg) as determined by LAL test.
Amino Acid Sequence
MCDLPQTHSLGSRRTLMLLAQMRRISLFSCLKDRHDFGFPQEEFGNQFQKAETIPVLHEMIQQIF NLFSTKDSSAAWDETLLDKFYTELYQQLNDLEACVIQGVGVTETPLMKEDSILAVRKYFQRITLY LKEKKYSPCAWEVVRAEIMRSFSLSTNLQESLRSKE
BackgroundAt least 23 different variants of IFN-α are known. The individual proteins have molecular masses between 19-26 kDa and consist of proteins with lengths of 156-166 and 172 amino acids. All IFN-α subtypes possess a common conserved sequence region between amino acid positions 115-151 while the amino-terminal ends are variable. Many IFN-α subtypes differ in their sequences by only one or two positions. Naturally occurring variants also include proteins that are truncated by 10 amino acids at the carboxyl-terminal end.