A DNA oligonucleotide end-labeled with IRDye 700 infrared dye is a good substrate for protein binding.
Using the Odyssey Infrared Imaging System, IRDye infrared dye labeled DNA detection is linear within a 50-fold dilution range from 9.1 fmol to 0.18 fmol. Infrared assays can be completed in less than two hours with no gel transfer or film exposure. The gel doesn’t even have to be removed from the glass plates for imaging. Plus, the gel can be placed back into the electrophoresis unit and run longer, if necessary.
The following IRDye 700-labeled Consensus Oligonucleotides are available from LI-COR:
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