Methods and compositions for chromosome-specific staining
First Claim
1. A chromosome-specific staining reagent comprising a heterogeneous mixture of labeled nucleic acid fragments, the labeled nucleic acid fragments being derived from the same chromosome type, and being substantially free of repetitive nucleic acid sequences having hybridization capacity.
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Abstract
Methods and compositions for chromosome-specific staining are provided. Compositions comprise heterogenous mixtures of labeled nucleic acid fragments having substantially complementary base sequences to unique sequence regions of the chromosomal DNA for which their associated staining reagent is specific. Methods include methods for making the chromosome-specific staining compositions of the invention, and methods for applying the staining compositions to chromosomes.
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Citations
17 Claims
- 1. A chromosome-specific staining reagent comprising a heterogeneous mixture of labeled nucleic acid fragments, the labeled nucleic acid fragments being derived from the same chromosome type, and being substantially free of repetitive nucleic acid sequences having hybridization capacity.
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14. A chromosome-specific staining reagent produced by the process of:
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isolating chromosome-specific DNA;
cloning pieces of the isolated chromosome-specific DNA;
disabling the hybridization capacity of repeated sequences contained in the cloned pieces of the isolated chromosome-specific DNA to form a collection of nucleic acid fragments which hybridize to unique chromosomal DNA sequences;
labeling the nucleic acid fragments of the collection to form a heterogeneous mixture of nucleic acid fragments. - View Dependent Claims (15, 16)
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17. A method of staining chromosomal DNA of a particular chromosome type or portion thereof, or a particular group of chromosome types, the method comprising the steps of:
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providing a heterogeneous mixture of labeled nucleic acid fragments, substantial portions of each labeled nucleic acid fragment in the heterogeneous mixture having base sequences substantially complementary to base sequences of the chromosomal DNA; and
reacting the heterogeneous mixture with the chromosomal DNA by in situ hybridization.
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Specification