This report describes the preparation, homogeneity, stability and certification studies of a plasmidic deoxyribonucleic acid (DNA) (ERM-AD413) containing a defined DNA fragment specific for a genetic modification present in Zea Mays MON 810 event (1) as well as a defined DNA fragment specific for the Zea Mays taxon. The CRM was processed in 2005 and certified in 2007 by the European Commission, Directorate General Joint Research Centre, Institute for Reference Materials and Measurements (IRMM) in Geel, Belgium. The CRM is available in plastic tubes containing 500 µL of the plasmidic DNA in 1 mmol/L EDTA pH 7.0 buffer. Each tube contains approximately 10 to the power of 9 copies of the ERM-AD413 plasmid which correspond approximately to 3.41 ng of DNA. The plasmid contains a 170 bp fragment of the MON 810 5' plant-P35S junction and a 351 bp fragment of the maize endogenous high mobility group gene (hmg) (2). both DNA sequences originated from DNA extracted from MON 810 seeds supplied by RAGT Semences (Rodez, France). The certified value is the number of each cloned DNA fragments per plasmid. The number ratio between those two DNA fragments is given as an indicative value measured by duplex and simplex real-time PCR.JRC.D.2-Reference material
