Catalog # or name ...
This protein is
produced in an expression system using Nicotiana sp. plants as
an expression host
At least 23
different variants of IFN-alpha 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-alpha
subtypes possess a common conserved sequence region between
amino acid positions 115-151 while the amino-terminal ends are
variable. Many IFN-alpha subtypes differ in their sequences at
only one or two positions. Naturally occurring variants also
include proteins truncated by 10 amino acids at the carboxy-terminal
power, containing 80% SDS.
assessed by SDS PAGE followed by Silver Stain Detection or
Western blot analysis and by Capillary Electrophoresis using a
capillary electrophoresis for estimation of purity. Mass
spectrometry of tryptic digest products for identity
The sequence of
the first twelve N-terminal amino acids was determined and was
found to be Cys-Asp-Leu-Pro-Gln-Thr-His-Ser-Leu-Gly-Ser-Arg,
conforming to the sequence of native human-IFα-2a. Other protein
fragments detected by mass spectroscopy of tryptic digestion
are highlighted in red on the following sequence representation.
< 0.0005 EU/µg
by LAL test.
IFN-alpha 2a is
fully biologically active when compared to standard. The
specific activity was determined by a quantitative gene reported
bioassay using human Type I interferon-sensitive cells. Compared
with other recombinant IFα-2a, assayed in the same conditions,
IFN-alpha 2a showed 6.1 × 108 Units/mg in reference to a viral
resistance assay using bovine kidney MDBK cells.
Product is presented as a
lyophilized powder stable at 4oC.
Adding 1 ml of distilled water to 1 mg of lyophilized powder
gives a solution of 0.2 mg/ml of IFN Alpha-2a. After
reconstitution in appropriate buffer aliquots should be stored
IFNA2 interferon, alpha 2 [ Homo sapiens ]
MGC125764; MGC125765; Leukocyte interferon; B cell interferon,
Type I interferon; IFNA2; IFN-α 2a; Interferon alpha-A; LeIF A;
Interferon alpha-2; Interferon alpha-2 Precursor;
interferon, alpha 2
interferon-alpha/beta receptor binding
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