Recombinant Human IFN-alpha-1B Protein重组人干扰素α1b

Description :
FAQ COA 已发表文献 Interferons (IFN) are a family of cytokines with potent antiviral, antiproliferative and immunomodulatory properties, classified based on their binding specificity to cell surface receptors . Human IFNA2 was originally cloned in the early 80s and now more than a dozen closely related IFN alpha subtypes have been identified in both the human and mouse genome, each sharing about 80%amino acid (aa) sequence homology. Structurally, type I IFNs belong to the class of five helical_x005f_x001e_bundle cytokines, with the IFNA subtypes containing 2 conserved disulfide bonds. The extracellular domain (ECD) of mature human IFNA1, also known as IFNA13, shares 63% aa sequence identity with mouse IFNA1. Two variants of human IFNA1 are known to exist, IFNA1a and IFNA1b, which only differ by a single residue at position 137. The type I IFNs bind to the interferon alpha receptor (IFNAR), which consists of two subunits: IFNAR1 (alpha subunit) and IFNAR2 (beta subunit). Product Properties Synonyms Human IFN-1b Accession P01562 GeneID 3439 Source E.coli-derived Human IFN-1b protein,Cys24-Glu189(A115).with an N-terminal Met. Molecular Weight Approximately 19.5 kDa AA Sequence MCDLPETHSL DNRRTLMLLA QMSRISPSSC LMDRHDFGFP QEEFDGNQFQ KAPAISVLHE LIQQIFNLFT TKDSSAAWDE DLLDKFCTEL YQQLNDLEAC VMQEERVGET PLMNVDSILA VKKYFRRITL YLTEKKYSPC AWEVVRAEIM RSLSLSTNLQ ERLRRKE Tag None Physical Appearance Sterile Filtered White lyophilized (freeze-dried) powder. Purity > 96% by SDS-PAGE and HPLC analyses. Biological Activity Fully biologically active when compared to standard. The specific activity determined by an anti-viral assay is no less than 1.0 108IU/mg. Endotoxin Formulation Lyophilized from a 0.2 m filtered solution in PBS, pH 7.4, containing 4% mannitol and 1% HSA. 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 -20C. Further dilutions should be made in appropriate buffered solutions.