Subunit A 3' end transcript control amplification. Whole RNA was extracted from seedlings and cDNA was generated as described in materials and methods. Polymerase Chain Reaction amplifications were performed with the appropriate primer pairs. Amplification products were fractionated by agarose gel electrophoresis, transferred to solid support and hybridized with a digoxigenin labeled probe corresponding to the transcript-4 amplification product. All four transcripts were successfully amplified. Bands produced from the PCR reaction were all of the appropriate, expected size. In addition, the transcript-4 probe successfully detected all four amplification products.