Methods and vectors for selectively cloning exons

摘要

The invention relates to a method for selectively cloning exons in which an eukaryotic genomic DNA fragment to be assayed is cloned into a shuttle vector in a cloning site of an intron flanked by exons. Upon expression in eukaryotic cells, exons present in the cloned DNA are spliced to the exons flanking the intron. After amplification of the cDNA of the expressed mRNA with primers specific for the exons in the vector by PCR, selectively cloned exons can be detected due to the size of the PCR product. The invention also relates to vectors used to carry out the method of the invention as well as to exon libraries.