A multi-dimensional approach for fractionating proteins using charged membranes.
Biotechnol Bioeng
; 110(6): 1704-13, 2013 Jun.
Article
en En
| MEDLINE
| ID: mdl-23296474
ABSTRACT
In an effort to increase selectivity among proteins with crossflow ultrafiltration, we offer and demonstrate a comprehensive approach to fractionate proteins of similar molecular weight and relatively close pI values. This multidimensional approach involves optimizing membrane charge type and density together with operating conditions such as precise control of pH, ionic strength, and transmembrane pressure for reduced membrane fouling. Each filtration experiment was performed in cross-flow configuration for â¼20 min, allowing fast screening for optimal separation as determined by maximum selectivity, Ψ, and purity, P. Using our comprehensive approach for fractionating mixtures RNase A-lysozyme and BSA-hemoglobin, we obtained values of Ψ = 9.1, P = 95.7%, and Ψ = 6.5, P = 62.1%, respectively.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Ultrafiltración
/
Proteínas
/
Membranas Artificiales
Idioma:
En
Revista:
Biotechnol Bioeng
Año:
2013
Tipo del documento:
Article
País de afiliación:
Estados Unidos