Fluorescence of Cyanine Dyes on DNA Microarrays
Author Information
Author(s): Agbavwe Christy, Somoza Mark M.
Primary Institution: Institute of Inorganic Chemistry, University of Vienna, Vienna, Austria
Hypothesis
The study aims to evaluate the sequence dependence of oligonucleotide labeling dyes using microarrays.
Conclusion
The fluorescence intensity of Cy3 and Cy5 dyes is significantly affected by the base sequence of the oligonucleotide.
Supporting Evidence
- Cy3 fluorescence is highest with guanine and adenine in the sequence.
- Intensity of Cy3 and Cy5 drops significantly with certain base sequences.
- The study developed a precise method to evaluate dye sensitivity to DNA sequences.
Takeaway
The brightness of the dyes used to label DNA can change a lot depending on the order of the DNA letters next to them.
Methodology
The study used high-throughput microarray synthesis to evaluate the fluorescence intensity of all 1024 possible 5′-labeled 5-mers.
Potential Biases
The results may be influenced by the specific labeling method used, which could introduce variability.
Limitations
The study does not account for potential longer-range interactions that may also affect fluorescence.
Digital Object Identifier (DOI)
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