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- W2024486078 abstract "A single-step dye affinity chromatographic separation method was developed to separate secreted alkaline phosphatase (SEAP) and glucoamylase produced in CHO cell culture and Aspergillus niger fermentation, respectively. The reactive dye, Procion® Green H-E4BD, was found to have a good binding capacity for SEAP, whereas Procion® Blue H-ERD was the best dye ligand for glucoamylase. However, these dyes have a relatively low selectivity for the target protein. Consequently, elution of the adsorbed proteins by KCl solution resulted in a product with many impurity proteins as evident by the multiple protein bands on SDS-PAGE. However, elution of SEAP by its substrate, phosphate, produced a relatively pure protein with a high specific enzyme activity because of the competition for active site between the substrate and the dye ligand. Also, a high-purity glucoamylase product was obtained by elution with a borate solution. The relatively inexpensive dye affinity chromatography thus can be used for purifying enzymes from cell culture and fermentation broths. The adsorption of SEAP on the dye-ligand affinity resin followed the Langmuir isotherm. An axial dispersion model with external mass transfer limitation was developed to simulate the breakthrough curve in the chromatographic column. This mathematical model can be used to scale up the protein adsorption process." @default.
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- W2024486078 date "2007-04-01" @default.
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- W2024486078 title "Affinity chromatographic separation of secreted alkaline phosphatase and glucoamylase using reactive dyes" @default.
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- W2024486078 doi "https://doi.org/10.1016/j.procbio.2006.11.005" @default.
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