The present invention involves a method for categorizing nucleic acid which comprises: producing a nucleic acid population by action of an endonuclease on double-stranded nucleic acid, such that each nucleic acid in the nucleic acid population has a double-stranded portion; contacting the nucleic acid...http://www.google.com.au/patents/US6670120?utm_source=gb-gplus-sharePatent US6670120 - Categorising nucleic acid
