Microfabricated Chip Electrophoresis for Automated Protein Separation
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Solution Overview
Problem
Current 2-D gel electrophoresis techniques are labor-intensive, time-consuming, and have low throughput, limiting their effectiveness in proteomics research due to lack of automation, sensitivity, and resolving power, and require manual handling and protein staining.
Innovation Solution
A microfabricated chip-based multiplexed absorbance-based electrophoresis system that performs isoelectric focusing and size-based protein separation in two dimensions using UV absorbance detection, enabling automated, high-throughput analysis without the need for protein staining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If 2-D gel electrophoresis is used for protein separation, then separation resolution is improved, but labor intensity and time consumption increase significantly
Solution Approach 1:
The patent replaces the manual mechanical operations of traditional 2-D gel electrophoresis (manual sample application, gel handling, staining) with an automated microfabricated chip system that performs isoelectric focusing and SDS-PAGE separation automatically, eliminating the need for manual handling and staining while maintaining separation resolution
Solution Approach 2:
The patent changes the physical parameters of the separation system by transitioning from macro-scale gel electrophoresis to micro-scale chip-based electrophoresis, using miniaturized channels and optimized electric field parameters to achieve both high resolution and automated operation
2Reliability
If traditional 2-D gel electrophoresis is used, then protein separation capability is maintained, but automation level remains low
Solution Approach 1:
The microfabricated chip integrates multiple functions into a single device: isoelectric focusing in the first dimension, SDS-PAGE separation in the second dimension, and UV absorbance detection, all within one automated platform that replaces multiple manual操作步骤
Solution Approach 2:
The system replaces manual mechanical operations with automated fluid handling and electrophoretic separation controlled by computer software, eliminating the need for manual gel preparation, sample application, and detection
3Measurement precision
If protein staining is used in 2-D gel electrophoresis, then detection sensitivity is achieved, but analysis time increases
Solution Approach 1:
The patent replaces the time-consuming chemical staining process with real-time UV absorbance detection that monitors protein separation as it occurs, eliminating the need for post-separation staining and scanning steps while maintaining detection sensitivity
Solution Approach 2:
The UV absorbance detection operates continuously throughout the electrophoresis process, providing real-time monitoring of protein separation without interruption, whereas traditional staining requires stopping the separation process to apply and develop stains
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enhances speed, sensitivity, and resolution, allowing for simultaneous analysis of multiple samples and improved coupling with mass spectrometry, addressing the limitations of traditional 2-D gel electrophoresis by automating the process and increasing throughput.
Implementation Method 1
A microfabricated chip-based multiplexed absorbance-based electrophoresis system that performs isoelectric focusing and size-based protein separation in two dimensions using UV absorbance detection
Implementation Method 2
a microfabricated chip utilized in a multiplexed absorbance-based electrophoresis system
Implementation Method 3
Isoelectric focusing (IEF) is used in the first dimension, which separates proteins according to their isoelectric points (pIs)
Data Source
AI summary
A multiplexed, absorbance-based microfabricated chip electrophoresis system, microfabricated chip, and method of use are included for the detection and identification of protein species. The microfabricated chip electrophoresis system capable of analyzing multiple samples simultaneously. The system uses a microfabricated chip having a sample chamber for first dimension separation of a sample, a first planar array of channels for second dimension separation of the sample approximately perpendicular the sample chamber, and a barrier separating the sample chamber from the first planar array of channels during the first dimension separation. In use, the sample is placed into a sample chamber, a barrier is established around the sample chamber, the sample is isoelectric focused within the sample chamber, the barrier is then removed, and the sample separated in the first array of channels by molecular weight.