E. coli DNA Residue Assay Kit (Cat. No. DDNA-021) uses PCR fluorescent probe technology to quantitatively detect residual E. coli DNA in samples. This kit provides rapid, highly specific and reliable detection with a minimum detection limit of fg levels. It contains a quantitative E. coli DNA reference standard and is used in conjunction with Creative Diagnostics Host Cell DNA Prep Kit to accurately determine the amount of residual E. coli DNA in biological samples.