Complex sentence: The goal of combining fluorescence and nucleic acids has been to provide a non-isotopic tag that is detectable to study DNA or RNA in their structure, function, or formation with other nucleic acids.
Split into simpler sentences: The goal of combining fluorescence and nucleic acids has been to provide a non-isotopic tag that is detectable to study DNA or RNA. This type of labeling allows scientists to study DNA or RNA in their structure, function, or formation with other nucleic acids.