Sample Preparation and Protein Determination for 2D-DIGE Proteomics.
Stephen Gargan1, Kay Ohlendieck2
1Department of Biology, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland.
Methods in Molecular Biology (Clifton, N.J.)
|November 15, 2022
Summary
This study details sample homogenization and protein assays for 2D-DIGE analysis. Proper preparation ensures accurate proteome-wide screening of protein abundance changes in comparative proteomics.
Area of Science:
- Proteomics
- Biochemistry
- Analytical Chemistry
Background:
- Fluorescence two-dimensional difference gel electrophoresis (2D-DIGE) is essential for separating proteins and identifying abundance changes.
- It is a key technique in top-down proteomics for comparative analysis.
- Effective sample preparation is critical for successful 2D-DIGE analysis.
Purpose of the Study:
- To describe standardized methods for sample homogenization.
- To outline a protein assay for determining protein concentration in homogenates.
- To ensure optimal preparation for 2D-DIGE analysis.
Main Methods:
- Sample homogenization techniques.
- Standardized protein concentration assay.
- Preparation of homogenates for differential fluorescent tagging.
Main Results:
- Provides a protocol for preparing protein homogenates.
- Ensures accurate protein concentration determination.
- Facilitates subsequent 2D-DIGE separation.
Conclusions:
- Standardized sample homogenization and protein assays are crucial for 2D-DIGE.
- Optimal preparation is vital for accurate proteome-wide screening.
- This chapter provides foundational methods for 2D-DIGE-based proteomics studies.
