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Updated: Aug 9, 2026

Total Protein Extraction and 2-D Gel Electrophoresis Methods for Burkholderia Species
Published on: October 15, 2013
Correlation analysis of two-dimensional gel electrophoretic protein patterns and biological variables
Werner Van Belle1, Nina Anensen, Ingvild Haaland
1Bioinformatics Group, Norut IT, Research Park Tromsø, Postboks 6434, N9294 Tromsø, NO, Norway. werner.van.belle@itek.norut.no
This study introduces a novel pixel-based analysis for two-dimensional gel electrophoresis (2DE) images, eliminating the need for spot detection. This method effectively correlates 2DE data with biological variables, revealing complex signaling networks.
Area of Science:
- Proteomics
- Biochemistry
- Bioinformatics
Background:
- Two-dimensional gel electrophoresis (2DE) is crucial for analyzing protein modifications.
- Traditional spot detection in 2DE is challenging with imperfect gels.
- A new pixel-based correlation technique is needed to overcome these limitations.
Purpose of the Study:
- To develop and validate a novel analysis technique for correlating 2DE images with biological variables.
- To enable the exploration of complex signaling networks without relying on spot detection.
Main Methods:
- Developed a pixel-by-pixel correlation analysis for 2DE images.
- Implemented image alignment, normalization, and rank transformation of pixel values and biological parameters.
- Utilized linear Pearson correlation for statistical analysis.
Main Results:
- Validated the technique on simulated 2DE images, demonstrating robustness with normalization factors.
- Applied the method to p53 2DE immunoblots from cancer cells (leukemia subtypes).
- Identified correlations between cancer type and p53 profiles, and a complex relationship with differentiation stage in AML.
Conclusions:
- The new method bypasses the need for spot detection in 2DE analysis.
- Enables the exploration of biosignatures within complex signaling networks.
- Facilitates a deeper understanding of protein modifications and their relation to biological variables.
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