Abstract
Details of the fine structure of a particular transcript may be assessed by S1 mapping or ribonuclease protection. The use of either of these techniques allows the detection of the 5' and 3' ends of a particular mRNA, as well as the splice junctions, precursors, and processing intermediates of mRNA. Primer extension provides a measure of the amount of a particular mRNA species and allows an exact determination of the 5' end of the mRNA. These three methods are introduced here.
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