Partition coefficients of alpha-amylase in aqueous two-phase systems PEG + MgSO4.7H2O + H2O at 298 K.
Biochim Biophys Acta
; 1379(2): 191-7, 1998 Feb 02.
Article
en En
| MEDLINE
| ID: mdl-9528654
ABSTRACT
Partition coefficients of alpha-amylase have been determined in a polyethylene glycol (average molecular mass 8000)/MgSO4.7H2O aqueous two-phase system at 298 K and the influence of polymer, salt and initial enzyme concentration on partition was investigated. Correlations are proposed which relates the partition coefficient to the initial enzyme concentration and the concentration difference between phases of polymer and salt. The free volume change, related to the densities of the separate phases, has a direct dependence with such polymer and salt concentration differences, respectively, and is then used to facilitate future estimations. Thus, the partition coefficient is a function of this physical parameter and the initial enzyme concentration employed (1.25, 2.50 and 5.00 g dm-3).
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Alfa-Amilasas
Idioma:
En
Revista:
Biochim Biophys Acta
Año:
1998
Tipo del documento:
Article
País de afiliación:
España