Electropherogram Analysis Deconvolution via Calibration Matrix
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Solution Overview
Problem
Current electrophoresis techniques face challenges in accurately separating and identifying unique macromolecules tagged with multiple dyes due to overlapping spectral contributions, leading to difficulties in deconvolving raw electropherogram data into distinct dye contributions.
Innovation Solution
The method involves selecting isolated and spectrally pure color peaks from raw electropherogram data, determining their spectra, and using a calibration matrix to deconvolve the data, separating the contributions of each dye and producing a clear electropherogram. This process includes identifying peaks with specific criteria, correlating them, and combining spectra to achieve accurate separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple dyes are used to distinguish nucleic acid sequences, then the ability to detect multiple features is improved, but the spectral overlap between dyes makes deconvolution difficult
Solution Approach 1:
The patent segments the spectral detection into multiple discrete wavelength channels (e.g., 400-700nm divided into specific bands). By measuring at separate wavelength intervals rather than continuous spectrum, the system creates discrete spectral signatures for each dye that can be mathematically deconvolved, resolving the overlap problem while maintaining multi-feature detection capability
Solution Approach 2:
The patent introduces a calibration matrix as an intermediary mathematical tool that translates the mixed spectral signals into individual dye contributions. The calibration matrix, derived from known dye spectra, acts as a mediator between the raw mixed signal and the separated dye components, enabling accurate deconvolution despite spectral overlaps
2Measurement precision
If spectral data is collected at multiple wavelengths, then the accuracy of dye identification is improved, but the complexity of data processing increases
Solution Approach 1:
The patent performs preliminary action by pre-calculating and storing the spectral signatures of individual dyes in a calibration matrix before actual analysis. This pre-processing step transforms the complex real-time deconvolution problem into a simpler matrix multiplication operation during data analysis, reducing processing complexity while maintaining high identification accuracy
Solution Approach 2:
The patent creates spectral copies of individual dye signatures stored in the calibration matrix, which serve as reference templates. During analysis, these copied reference spectra are compared against the mixed sample spectrum through mathematical operations, enabling accurate dye identification without requiring complex real-time spectral decomposition algorithms
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
This approach effectively separates the spectral contributions of each dye, producing a clear electropherogram that accurately represents the presence of unique macromolecules, enhancing the identification of alleles and nucleic acid profiles from complex data sets.
Implementation Method 1
Electrophoresis is the motion of dispersed particles relative to a fluid under the influence of a spatially uniform electric field. It may be caused by the presence of a charged interface between the particle surface and the surrounding fluid.
Implementation Method 2
Each peak has a spectral contribution from one or more of the dyes... selecting from the raw electropherogram data one or more color peaks that contain signal intensity versus wavelength data for the first dye
Data Source
AI summary
Methods for analyzing raw electropherogram data are disclosed. Some methods includes extracting color data as a function of time or position from the raw electropherogram data, selecting from the electropherogram one or more peaks that contain color data for a first dye and substantially no color data from other dyes used in electrophoresis. The method also includes determining the color spectrum of the first dye, and using the color spectrum of the first dye to deconvolve the color data of the raw electropherogram data to separate the contributions of each of the dyes to the raw electropherogram data. Systems and apparatus for producing electropherograms are also disclosed.