Difference gel electrophoresis
2009
Minden, Jonathan S. | Dowd, Susan R. | Meyer, H. E. (Helmut E) | Stühler, Kai
Difference gel electrophoresis (DIGE) was invented to circumvent the inherent variability of 2-DE. This variability is a natural consequence of separating thousands of proteins over a large space, such as a 15x20 cm slab of polyacrylamide gel. The originators of 2-DE envisioned being able to compare cancerous cells and normal cells to understand what makes these cells different. Gel-to-gel variability made this an extremely difficult task. We reasoned that if both samples could be run on the same gel, then the inherent variability would be obviated. Thus, we created matched sets of fluorescent dyes that allows one to compare two or three protein samples on a single gel. In the 12 years since the description of DIGE first appeared in Electrophoresis, this founding paper has been cited over 660 times. This review highlights some of the improvements and applications of DIGE. We hope these examples are illustrative of what has been done and where the field is headed.
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