Isolation and characterization of two positional isomers of novel heterogeneous branched cyclomaltohexaoses (alpha-cyclodextrins) having a D-galactobiosyl residue on the side chain.
Carbohydr Res
; 339(18): 2875-81, 2004 Dec 27.
Article
em En
| MEDLINE
| ID: mdl-15582614
ABSTRACT
Transgalactosylated products, 2-O-alpha-D-galactobiosyl-cyclomaltohexaoses (alpha-cyclodextrins, alphaCDs), were synthesized by alpha-galactosidase from coffee bean using melibiose and alphaCD as a donor substrate and an acceptor, respectively. Two positional isomers of 2-O-alpha-galactobiosyl-alphaCDs were isolated and purified by HPLC, and their structures were elucidated by FABMS and NMR spectroscopies, as well as by an enzymatic degradation method. The chromatographic behavior of these novel galactosylated alphaCDs was compared on three HPLC columns with different separation modes.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Coffea
/
Alfa-Ciclodextrinas
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article