Multiply-primed amplification of nucleic acid sequences

C - Chemistry – Metallurgy – 12 – P

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C12P 19/34 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2521520

Improved processes for the amplification of target DNA sequences in the form of single or double stranded DNA molecules, especially those present in colony and plaque extracts, using multiple specific and/or random sequence oligonucleotide primers are disclosed along with methods for detecting such amplified target sequences wherein some or all of the deoxyribonucleotides are replaced by deoxyribonucleotide analogues that reduce the Tm of the amplified product. The product of this amplification is used for DNA sequencing and other analyses that involve hybridization. Kits containing components for use in the invention is also described. Also described are further uses of this amplified DNA in sequencing, single base substitution detection, modifying the restriction enzyme fragmentation patterns and other molecular biology applications.

L'invention concerne des procédés améliorés d'amplification de séquences d'ADN cibles se présentant sous la forme de molécules d'ADN à brin unique ou à double brin, notamment celles qui sont présentes dans les extraits de colonies et de plaques, au moyen de plusieurs amorces d'oligonucléoides en séquences spécifiques et/ou aléatoires, ainsi que des procédés de détection des ces séquences cibles amplifiées, certains ou tous les désoxyribonucléotides étant remplacés par des analogues de désoxyribonucléotides qui réduisent le Tm du produit amplifié. Le produit d'amplification sert au séquençage d'ADN et à d'autres analyses qui impliquent l'hybridisation. L'invention porte aussi sur des kits contenant des composés à utiliser dans l'invention. Elle concerne également d'autres utilisations de cet ADN amplifié dans le séquençage, la détection de substitution à base unique, la modification des schémas de fragmentation d'enzyme de restriction et d'autres applications de biologie moléculaire.

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