Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/19201
Title: | Extraction of an active enzyme by self-buffering ionic liquids: a green medium for enzymatic research |
Author: | Gupta, Bhupender S. Taha, Mohamed Lee, Ming-Jer |
Keywords: | AQUEOUS BIPHASIC SYSTEMS ALPHA-CHYMOTRYPSIN BIOLOGICAL BUFFERS DIRECT ELECTROCHEMISTRY CARBON NANOTUBES PH BUFFERS SOLVENTS CATALYSIS AGGREGATION EQUILIBRIA |
Issue Date: | 2016 |
Publisher: | ROYAL SOC CHEMISTRY |
Abstract: | In this work, the extraction of a model enzyme alpha-chymotrypsin in its active conformation from an aqueous solution by using new biocompatible and self-buffering Good's buffer ionic liquids (GBILs)-based aqueous biphasic systems (ABSs) is demonstrated. The experimental liquid-liquid phase boundary data for these new GBIL-based ABSs were measured at 298.2 K. These new ionic liquids are derived from biological Good's buffers as anions and tetra-alkylammonium as cations. The buffering potential of these GBILs was confirmed by measuring their pH profiles and protonation constants (pK(a)) in aqueous solution by a potentiometric method at various temperatures. Moreover, these GBILs provide a greater stabilizing effect on the activity of alpha-chymotrypsin, as compared with the corresponding Good's buffers. Therefore, the new self-buffering GBILs may not only serve as a biocompatible medium for enzymatic research, but also avoid the use of an external buffering agent, which is often needed for pH control in the case of using a conventional ILs-based medium. Therefore, these new biocompatible GBILs are more advantageous over the conventional ILs-based media for enzymatic research. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/19201 |
DOI: | 10.1039/c6ra00607h |
ISSN: | 2046-2069 |
Publisher Version: | 10.1039/c6ra00607h |
Appears in Collections: | CICECO - Artigos |
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Extraction of an active enzyme by self-buffering ionic liquids A green medium for enzymatic research_10.1039c6ra00607h.pdf | 728.33 kB | Adobe PDF | View/Open |
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