Differential (+/-) first-strand cDNA screening methods identify clones corresponding to mRNAs that are expressed at a higher level in one of a pair of phenotypically different cells. This approach is limited by the fact that screening of libraries with labeled first-strand cDNAs synthesized from unfractionated mRNA can detect clones containing sequences representing approx 0.1% or more of the complexity of mRNA (i.e., mRNAs present at greater than about 200 copies per cell since a typical mammalian cell line contains approx 250,000 mRNAs).
CITATION STYLE
Kuehl, W. M., & Battey, J. (2003). Generation of a Polymerase Chain Reaction Renewable Source of Subtractive cDNA. In PCR Protocols (pp. 287–304). Humana Press. https://doi.org/10.1385/0-89603-244-2:287
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