title: Development of a reference material of a single DNA molecule for the quality control of PCR testing.
abstract: We developed a reference material of a single DNA molecule with a specific nucleotide sequence. The double-strand linear DNA which has PCR target sequences at the both ends was prepared as a reference DNA molecule, and we named the PCR targets on each side as confirmation sequence and standard sequence. The highly diluted solution of the reference molecule was dispensed into 96 wells of a plastic PCR plate to make the average number of molecules in a well below one. Subsequently, the presence or absence of the reference molecule in each well was checked by real-time PCR targeting for the confirmation sequence. After an enzymatic treatment of the reaction mixture in the positive wells for the digestion of PCR products, the resultant solution was used as the reference material of a single DNA molecule with the standard sequence. PCR analyses revealed that the prepared samples included only one reference molecule with high probability. The single-molecule reference material developed in this study will be useful for the absolute evaluation of a detection limit of PCR-based testing methods, the quality control of PCR analyses, performance evaluations of PCR reagents and instruments, and the preparation of an accurate calibration curve for real-time PCR quantitation.
authors: National Food Research Institute, National Agriculture and Food Research Organization, 2-1-12, Kannondai, Tsukuba, Ibaraki 305-8642, Japan.
authors: Junichi
authors: J
authors: Mano
authors: Shuko
authors: S
authors: Hatano
authors: Satoshi
authors: S
authors: Futo
authors: Junji
authors: J
authors: Yoshii
authors: Hiroki
authors: H
authors: Nakae
authors: Shigehiro
authors: S
authors: Naito
authors: Reona
authors: R
authors: Takabatake
authors: Kazumi
authors: K
authors: Kitta
mesh_terms: D004247:DNA / Q000032:analysis* / Q000592:standards; D030821:Plants, Genetically Modified / Q000235:genetics; D011786:Quality Control; D060888:Real-Time Polymerase Chain Reaction / Q000592:standards
chemical_list: D004247:DNA