title: N-terminal amino acid sequence of persimmon fruit beta-galactosidase.
abstract: beta-Galactosidase (EC 3.2.1.23) from persimmon fruit was purified 114-fold with a 15% yield using Sephadex G-100 gel filtration, CM-Sephadex ion exchange, and Sephacryl S-200 gel filtration chromatography, with subsequent electroelution from nondenaturing polyacrylamide gel electrophoresis (PAGE) gels. The estimated molecular mass of the native beta-galactosidase by Sephacryl S-200 was 118 kD. After sodium dodecyl sulfate-PAGE of the enzyme electroeluted from native gels, two subunits with estimated molecular masses of 34 and 44 kD were observed, suggesting that the native enzyme was an aggregate of several subunits. Amino acid composition and N-terminal amino acid sequences of the two major subunits were different.
authors.affiliation: Department of Horticulture, Yeungnam University, Kyongsan, Korea.
authors.forename: I K
authors.initials: IK
authors.lastname: Kang
authors.forename: S G
authors.initials: SG
authors.lastname: Suh
authors.forename: K C
authors.initials: KC
authors.lastname: Gross
authors.forename: J K
authors.initials: JK
authors.lastname: Byun
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D004591:Electrophoresis, Polyacrylamide Gel; D005638:Fruit / Q000201:enzymology*; D046911:Macromolecular Substances; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000737:chemistry / Q000302:isolation & purification; D001616:beta-Galactosidase / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D000596:Amino Acids; D046911:Macromolecular Substances; D010446:Peptide Fragments; D001616:beta-Galactosidase