A novel, efficient and simple technique that combines subtractive hybridization with kinetic enrichment is proposed for obtaining enriched cDNA. The method is based on the use of a set of special primers that allow for the selective amplification by PCR only of differentially distributed sequences. Using the proposed technique, cDNA of a new gene XEp-1, specifically expressed in the presumptive epidermis of Xenopus laevis, was cloned, starting with the stage of midgastrula.

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