An immobilized metal affinity chromatography (IMAC) method for separating and/or purifying compounds containing a non-shielded purine or pyrimidine moiety or group such as nucleic acid, presumably through interaction with the abundant aromatic nitrogen atoms in the purine or pyrimidine moiety. The method...http://www.google.de/patents/US20040152076?utm_source=gb-gplus-sharePatent US20040152076 - Nucleic acid separation using immobilized metal affinity chromatography
