Method for nucleic acid sequencing

C - Chemistry – Metallurgy – 12 – Q

Patent

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C12Q 1/68 (2006.01)

Patent

CA 2523919

A method for determining the sequence of at least a portion of a single- stranded nucleic acid molecule by base-specifically labeling the exposed bases of the nucleic acid molecule using heavy element-substituted nucleotide bases which form Watson-Crick type base-pairs with the exposed bases of the nucleic acid molecule and then imaging the labeled single-stranded nucleic acid molecule using electron microscopy, e.g., transmission electron microscopy (TEM), or some other method that permits discrimination of the heavy element substituted nucleotide bases is described. The image is analyzed to determine the base sequence of at least a portion of the nucleic acid molecule.

L'invention concerne un procédé permettant de déterminer la séquence d'au moins une partie d'une molécule d'acide nucléique à brin unique par marquage spécifique de la base des bases exposées de la molécule d'acide nucléique au moyen de bases nucléotidiques à substitution d'élément lourd qui forment des pairs de base de type Watson-Crick avec les bases exposées de la molécule d'acide nucléique, puis par imagerie de la molécule d'acide nucléique à brin unique marquée au moyen de la microscopie électronique, par exemple, la microscopie électronique à transmission (MET) ou tout autre procédé qui permet de différencier les bases nucléotidiques à substitution d'élément lourd. L'image est analysée afin de déterminer la séquence de base d'au moins une partie de la molécule d'acide nucléique.

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