Marathon-Ready cDNAs—cDNAs made from high-quality Premium Poly A+ RNA and ligated to the Marathon Adaptor—are ready for 5'- and 3'-RACE PCR (1). Each Marathon-Ready cDNA is a premade, tissue-specific “pool” of double-stranded cDNA from which full-length genes can be amplified by using sets of gene-specific primers. They can also be used to study tissue-specific gene expression and to find polymorphic forms of mRNA or mRNA belonging to a multigene family.
Marathon-Ready cDNA is synthesized from Premium RNA prepared from various rat tissues using a procedure optimized to produce full-length cDNA and to eliminate 3' heterogeneity (2, 3). After synthesis, blunt ends are created and the Marathon Adaptor is ligated to both ends of the double-stranded cDNA.