| abstract |
The present application discloses a labeled nucleotide comprising a label attached via a linker, wherein said labeled nucleotide has the formula wherein R 1 is a residue with a negative net charge, preferably selected from the group consisting of a phosphate group, and a sulphate group; wherein R 2 , R 3 and R 4 are independently selected from the group consisting of H 2 , OH 2 , and O; wherein "n" is an integer between 0 and 16; wherein "a" is an integer between 1 and 10; wherein SP is absent or a spacer; wherein X is said label; and wherein Y is a nucleotide or nucleoside. Furthermore, oligonucleotides comprising a labeled nucleotide according to the present invention and the use as a primer in amplification based methods is disclosed herein. |