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The study of low-copy viral or genomic DNA sequences by in situ hybridization is often
limited by sensitivity. The ability to detect a single copy of a specific gene in
situ has many advantages and multiple applications in molecular biology, pathology,
and cell biology. One of the limitations of in situ hybridization, however, is detection
and quantitation of very low levels of nucleic acid targets where the signal is insufficient
to distinguish it clearly from background noise. The advent of polymerase chain reaction
technology to amplify target nucleic acids provides an opportunity to develop new
technologies to examine this end of the spectrum of gene expression or infection.
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© 1994 Elsevier Inc. Published by Elsevier Inc. All rights reserved.