title: Extraction and separation of water-soluble proteins from Bacillus thuringiensis-transgenic and non-transgenic maize species by CZE.
abstract: A new method for extraction and CZE separation and characterization of water-soluble proteins (albumin fraction) from Bacillus thuringiensis-transgenic and non-transgenic maize varieties was developed. Protein content in the extracts from maize flours was estimated by UV-absorbance at 280 nm and Lowry protein assay. Protein extracts were analyzed by CZE in four acidic BGEs (100 mM H(3)PO(4), 50 mM Tris, pH 2.25; 500 mM acetic acid, pH 2.6; 200 mM formic acid, 200 mM acetic acid, pH 2.05; 200 mM iminodiacetic acid, pH 2.26) using a homemade CZE device equipped with bare fused silica capillary and UV-absorption detector at 206 nm. Among the tested BGEs, the best resolution of extracted proteins was achieved in isoelectric BGE, 200 mM iminodiacetic acid, pH 2.26. Well-resolved components of protein extracts were characterized by effective electrophoretic mobilities and corrected (migration times normalized) peak areas. Significant qualitative and quantitative differences in CZE-UV profiling were found. This approach can potentially be used to distinguish the B. thuringiensis variety from the wild maize in an easy and straightforward way.
authors.affiliation: Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
authors.forename: Petra
authors.initials: P
authors.lastname: Sázelová
authors.forename: Václav
authors.initials: V
authors.lastname: Kasicka
authors.forename: Elena
authors.initials: E
authors.lastname: Ibáñez
authors.forename: Alejandro
authors.initials: A
authors.lastname: Cifuentes
mesh_terms: D001413:Bacillus thuringiensis / Q000235:genetics*; D019075:Electrophoresis, Capillary; D010940:Plant Proteins / Q000235:genetics / Q000302:isolation & purification*; D030821:Plants, Genetically Modified / Q000737:chemistry* / Q000235:genetics; D011994:Recombinant Proteins / Q000235:genetics / Q000302:isolation & purification; D012995:Solubility; D014867:Water; D003313:Zea mays / Q000737:chemistry* / Q000235:genetics
chemical_list: D010940:Plant Proteins; D011994:Recombinant Proteins; D014867:Water