Spectrally resolvable rhodamine dyes for nucleic acid sequence determination
First Claim
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1. A method of distinguishing polynucleotides having different 3'"'"'-terminal dideoxynucleotides in the chain termination method of DNA sequencing, the method comprising the steps of:
- forming a mixture of a first, a second, a third, and a fourth class of polynucleotides, each polynucleotide in the first class having a 3'"'"'-terminal dideoxyadenosine and being labeled with a first dye selected from the going consisting of tetramethylrhodamine, rhodamine X, rhodamine 6G, and rhodamine 110;
each polynucleotide in the second class having a 3'"'"'-terminal dideoxycytidine and being labeled with a second dye selected from the group consisting of tetramethylrhodamine, rhodamine X, rhodamine 6G, and rhodamine 110;
each polynucleotide in the third class having a 3'"'"'-terminal dideoxyguanosine and being labeled with a third dye selected from the group consisting of tetramethylrhodamine, rhodamine X, rhodamine 6G, and rhodamine 110; and
each polynucleotide in the fourth class having a 3'"'"'-terminal dideoxythymidine and being labeled with a fourth dye selected from the group consisting of tetramethylrhodamine, rhodamine X, rhodamine 6G, and rhodamine 110;
wherein each class of polynucleotide in the mixture is labeled with a different dye;
electrophoretically separating on a gel the polynucleotides in the mixture so that bands of similarly sized polynucleotides are formed;
illuminating with an illumination beam the bands on the gel, the illumination beam being capable of causing the dyes to fluoresce; and
identifying the classes of the polynucleotides in the bands by the fluorescence or absorption spectrum of the dyes.
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Abstract
A spectrally resolvable set of rhodamine dyes are provided for use in the chain termination method of nucleic acid sequencing. A different rhodamine dye from the group consisting of tetramethylrhodamine, rhodamine X, rhodamine 6G, and rhodamine 110 is attached to the base of each of the dideoxynucleotides used in the sequencing method by way of an alkynylamino linker. Preferably, the labeled dideoxynucleotides are incorporated into the growing DNA chains by Taq DNA polymerase.
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10 Claims
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1. A method of distinguishing polynucleotides having different 3'"'"'-terminal dideoxynucleotides in the chain termination method of DNA sequencing, the method comprising the steps of:
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forming a mixture of a first, a second, a third, and a fourth class of polynucleotides, each polynucleotide in the first class having a 3'"'"'-terminal dideoxyadenosine and being labeled with a first dye selected from the going consisting of tetramethylrhodamine, rhodamine X, rhodamine 6G, and rhodamine 110;
each polynucleotide in the second class having a 3'"'"'-terminal dideoxycytidine and being labeled with a second dye selected from the group consisting of tetramethylrhodamine, rhodamine X, rhodamine 6G, and rhodamine 110;
each polynucleotide in the third class having a 3'"'"'-terminal dideoxyguanosine and being labeled with a third dye selected from the group consisting of tetramethylrhodamine, rhodamine X, rhodamine 6G, and rhodamine 110; and
each polynucleotide in the fourth class having a 3'"'"'-terminal dideoxythymidine and being labeled with a fourth dye selected from the group consisting of tetramethylrhodamine, rhodamine X, rhodamine 6G, and rhodamine 110;
wherein each class of polynucleotide in the mixture is labeled with a different dye;electrophoretically separating on a gel the polynucleotides in the mixture so that bands of similarly sized polynucleotides are formed; illuminating with an illumination beam the bands on the gel, the illumination beam being capable of causing the dyes to fluoresce; and identifying the classes of the polynucleotides in the bands by the fluorescence or absorption spectrum of the dyes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification