The promise of gel-based proteomics

Area of Science:

• Biochemistry
• Analytical Chemistry
• Molecular Biology

Background:

• Two-dimensional electrophoresis (2DGE) predates the formal field of proteomics.
• The complexity of proteomes often exceeds the resolving power of 2DGE alone.

Purpose of the Study:

• To evaluate the current state and future potential of 2DGE in proteomics.
• To discuss the challenges of using 2DGE for low-abundance biomarker discovery.

Main Methods:

• Orthogonal electrophoresis for comprehensive protein separation.
• Discussion of multidimensional separation strategies.

Main Results:

• 2DGE excels at resolving total cellular protein content.
• High-abundance proteins obscure low-abundance candidate biomarkers in 2DGE.
• Procedural complexity and lack of automation limit clinical laboratory adoption.

Conclusions:

• Further development of upstream dimensions can enhance 2DGE's utility.
• The clinical promise of proteomics remains unfulfilled due to 2DGE's limitations.