Covalent joining of DNA strands to RNA strands catalyzed by vaccinia topoisomerase

摘要

The present invention provides a method of covalently joining a DNA strand to an RNA strand, a method of tagging a 5′ end of an RNA molecule, a DNA-RNA molecule which has been joined in vitro by the use of a topoisomerase, a method of tagging a 5′ end of an mRNA, and a method of isolating and cloning full-length gene sequences using capped mRNA after subtraction of non-capped RNA.