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A nice 2D-DIGE difference

December 8, 2006

This week is very stressful because I am doing a 2200+ euros 2D-DIGE experiment (*) on samples from a rat organ we never studied before and from which I cannot obtain any more new samples.

We found a new pattern of proteins dispersion (compared to our previous experiments on other organs) and, more importantly, we found a clear difference in protein expression in at least 2 spots. In the image below, all the whitish spots mean proteins in these spots are found in equal amounts in the 3 conditions. But spots in red or green mean proteins expressed at different levels (even on/off) between conditions!

Difference in protein expression pattern in rat, revealed by 2D-DIGE

Now, we’ll have to perform a more mathematical/quantitative exploration of these expression patterns and hopefully identify these interesting proteins by mass spectrometry.

(*) 5nmol of Cy dyes (proteins labelling molecules) cost 2215 euros and weight something like 2.75*10-6g! I used nearly all that amount for my experiment. And I don’t take into account the 3-lasers scanner and common lab reagents

From → Lab life, Proteomics

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