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Electrophoresis process using ionic liquids

a technology of ionic liquids and electrophoresis gels, which is applied in the direction of fluid pressure measurement, liquid/fluent solid measurement, peptides, etc., can solve the problems of organic solvents that are not compatible with the electrophoresis gel or the aqueous system used to form the gel, and the current electrophoresis system is limited

Inactive Publication Date: 2005-12-22
LARGE SCALE PROTEOMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a process for separating macromolecules, particularly proteins, using an electrophoresis separation process in a non-aqueous system. The invention provides a method for using an ionic liquid as a solvent for the separation of macromolecules in an organic solvent. The invention also provides an electrophoresis gel substrate that can separate macromolecules in a stable gel. The invention also includes an ionic liquid that can be used to separate hydrophobic compounds. The technical effects of the invention include improved separation of macromolecules, particularly proteins, in a non-aqueous system and the ability to separate hydrophobic compounds.

Problems solved by technology

The presently available electrophoresis systems are limited by the ability to solubilize the proteins in an aqueous medium using buffers, salts, denaturants, detergents or other solubilizing agents.
Many proteins that are highly hydrophobic cannot be solubilized in aqueous systems, and thus, cannot be subjected to electrophoresis separation using conventional electrophoresis processes.
However, the organic solvents are not compatible with the electrophoresis gels or the aqueous systems used to form the gel.

Method used

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  • Electrophoresis process using ionic liquids

Examples

Experimental program
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Effect test

example 1

[0070] This example demonstrates the formation of a non-aqueous electrophoresis gel.

[0071] A polyurethane prepolymer was obtained from Dow Chemical Co. under the trademark HYPOL G-50 and 1 part by volume (3.2 g) was combined with 6 parts by volume water (19.2 g). The components were mixed well and allowed to polymerize. The resulting gel was allowed to dry over several days in air at room temperature.

[0072] A first sample of the dried gel (0.5446 g) was covered with ethylene chloride in a closed container and allowed to stand overnight at room temperature. The resulting gel was clear, soft and pliable. The gel was weighed (6.18 g) which demonstrated an increase in weight of 11.3 fold.

example 2

[0073] A polyurethane electrophoresis gel was prepared in the absence of water in this example.

[0074] A 50% solution of HYPOL G-50 from Dow Chemical Co. was obtained in methylene chloride. A 50% v / v solution was prepared from 0.5 ml (0.45 g) of ethylenediamine and 0.5 ml of methylene chloride. 1.0 ml of the 50% solution of the prepolymer G-50 was mixed with 28.3 μl of the 50% solution of ethylenediamine. The resulting mixture gelled immediately.

example 3

[0075] The solution of the prepolymer G-50 of Example 2 was diluted with dry methylene chloride to obtain a 15% wt / vol concentration. The solution of the ethylenediamine was diluted with dry methylene chloride to obtain a 10% solution. 21 μl of the 10% ethylenediamine solution was combined with 1 ml of methylene chloride. Thereafter, 1 ml of the 15% solution of the prepolymer G-50 was added. The resulting mixture polymerized in about 1-2 minutes to produce a clear gel with no water and no bubbles.

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Abstract

Highly hydrophobic compounds and hydrophobic proteins are solubilized in a non-aqueous solvent containing an electrolyte for electrophoretic separation. The non-aqueous solvent is an ionic liquid or a mixture of an organic solvent containing an ionic liquid in an amount to render the solvent electrically conductive and amenable for electrophoretic separation. The hydrophobic proteins are separated by electrophoresis using an electrophoresis gel that is compatible with the organic solvent and ionic liquid.

Description

FIELD OF THE INVENTION [0001] The present invention is directed to a process for processing, solubilizing or treating highly hydrophobic compounds, and particularly hydrophobic proteins with a non-aqueous liquid that is electrically conductive. The process can include electrophoretic separation of molecules, and particularly proteins, polypeptides and macromolecules using an ionic liquid as an electrolyte in an organic solvent. The invention is further directed to novel ionic liquids and to a process for making novel ionic liquids for solubilizing highly hydrophobic proteins and for the electrophoretic separation of molecules. BACKGROUND OF THE INVENTION [0002] Electrophoresis is a well known technique for separating complex organic molecules. In recent years, electrophoresis has been used extensively in the separation, isolation and analysis of proteins. Electrophoresis has the advantage of being able to separate a large number of proteins from a very small sample. [0003] In the ty...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08F2/58G01N27/447
CPCG01N27/44747
Inventor ANDERSON, NORMAN G.BRAATZ, JAMES A.
Owner LARGE SCALE PROTEOMICS