title: Purification and characterization of recombinant mouse interferon-beta.
abstract: Recombinant mouse interferon-beta (rMuIFN-beta) produced in Escherichia coli was purified to homogeneity and characterized. The purified protein exhibited a single band of Mr 19,900 on SDS-polyacrylamide gel electrophoresis under both reducing and nonreducing conditions, and also exhibited a single band on native polyacrylamide gel electrophoresis at pH 4.3. The observed molecular weight corresponded to that of the polypeptide moiety of natural MuIFN-beta of Mr 19,700. The amino acid composition and the amino-terminal sequence of the purified rMuIFN-beta were identical to those predicted from cDNA sequence. These results indicate that the purified protein is a nonglycosylated MuIFN-beta, which forms no disulfide-linked dimer and probably exists as a monomeric form.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000378:metabolism; D007370:Interferon Type I / Q000302:isolation & purification*; D051379:Mice; D008970:Molecular Weight; D011487:Protein Conformation; D011994:Recombinant Proteins / Q000302:isolation & purification*
chemical_list: D007370:Interferon Type I; D011994:Recombinant Proteins