K. Faulstich et al., A NEW CLASS OF 3'-MODIFIED NUCLEOTIDES AS CHAIN-TERMINATORS FOR DNA-SEQUENCING, Bioorganic & medicinal chemistry letters, 4(16), 1994, pp. 1975-1978
We describe the use of 3'-modified thymidine nucleotides as potent cha
in terminators in Sanger's DNA sequencing reactions by application of
T7 DNA polymerase and Mn2+-ions. These nucleotides contain fluorescein
which is linked directly or by mono-, di- and tetraglycine units to t
he 3'-position of a 3'-amino-2'-3'dideoxyribose.