Species : |
Human |
Source : |
E.coli |
Tag : |
Non |
ProteinLength : |
167 |
Description : |
IFN-αs are proteins secreted by leukocyte. They are mainly involved in innate immune response against viral infection. The IFN-α family has 13 subtypes and 23 different variants. 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-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 end. |
Form : |
Lyophilized from a 0.2μm filtered solution in PBS, pH 7.4, containing 4 % mannitol and 1 % HSA. |
Bio-activity : |
Fully biologically active when compared to standard. The specific activity determined by an anti-viral assay is no less than 1.0 × 10⁸ IU/mg. |
Molecular Mass : |
Approximately 19.5 kDa, a single non-glycosylated polypeptide chain containing 167 amino acids. |
AA Sequence : |
MCDLPETHSLDNRRTLMLLAQMSRISPSSCLMDRHDFGFPQEEFDGNQFQKAPAISVLHELIQQIFNLFTTKDSSAAWDEDLLDKFCTELYQQLNDLEACVMQEERVGETPLMNVDSILAVKKYFRRITLYLTEKKYSPCAWEVVRAEIMRSLSLSTNLQERLRRKE |
Endotoxin : |
Less than 1 EU/µg of rHuIFN-α1b as determined by LAL method. |
Purity : |
>96% by SDS-PAGE and HPLC analysis. |
Storage : |
Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20 to -70 centigrade as supplied. 1 month, 2 to 8 centigrade under sterile conditions after reconstitution. 3 months, -20 to -70 centigrade under sterile conditions after reconstitution. |
Reconstitution : |
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤-20 centigrade. Further dilutions should be made in appropriate buffered solutions. |