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Title: Determining orientation and direction of DNA sequences

Abstract

Determining orientation and direction of DNA sequences. A method by which fluorescence in situ hybridization can be made strand specific is described. Cell cultures are grown in a medium containing a halogenated nucleotide. The analog is partially incorporated in one DNA strand of each chromatid. This substitution takes place in opposite strands of the two sister chromatids. After staining with the fluorescent DNA-binding dye Hoechst 33258, cells are exposed to long-wavelength ultraviolet light which results in numerous strand nicks. These nicks enable the substituted strand to be denatured and solubilized by heat, treatment with high or low pH aqueous solutions, or by immersing the strands in 2.times.SSC (0.3M NaCl+0.03M sodium citrate), to name three procedures. It is unnecessary to enzymatically digest the strands using Exo III or another exonuclease in order to excise and solubilize nucleotides starting at the sites of the nicks. The denaturing/solubilizing process removes most of the substituted strand while leaving the prereplication strand largely intact. Hybridization of a single-stranded probe of a tandem repeat arranged in a head-to-tail orientation will result in hybridization only to the chromatid with the complementary strand present.

Inventors:
 [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
873174
Patent Number(s):
6107030
Assignee:
Regents of University of California (Los Alamos, NM) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
determining; orientation; direction; dna; sequences; method; fluorescence; situ; hybridization; strand; specific; described; cell; cultures; grown; medium; containing; halogenated; nucleotide; analog; partially; incorporated; chromatid; substitution; takes; opposite; strands; sister; chromatids; staining; fluorescent; dna-binding; dye; hoechst; 33258; cells; exposed; long-wavelength; ultraviolet; light; results; numerous; nicks; enable; substituted; denatured; solubilized; heat; treatment; ph; aqueous; solutions; immersing; times; ssc; 3m; nacl; 03m; sodium; citrate; name; procedures; unnecessary; enzymatically; digest; exo; iii; exonuclease; excise; solubilize; nucleotides; starting; sites; denaturing; solubilizing; process; removes; leaving; prereplication; intact; single-stranded; probe; tandem; repeat; arranged; head-to-tail; result; complementary; dna strand; dna sequences; dna sequence; ultraviolet light; aqueous solution; aqueous solutions; cell culture; situ hybridization; medium containing; cell cultures; process removes; ph aqueous; complementary strand; violet light; determining orientation; /435/

Citation Formats

Goodwin, Edwin H., and Meyne, Julianne. Determining orientation and direction of DNA sequences. United States: N. p., 2000. Web.
Goodwin, Edwin H., & Meyne, Julianne. Determining orientation and direction of DNA sequences. United States.
Goodwin, Edwin H., and Meyne, Julianne. Sat . "Determining orientation and direction of DNA sequences". United States. https://www.osti.gov/servlets/purl/873174.
@article{osti_873174,
title = {Determining orientation and direction of DNA sequences},
author = {Goodwin, Edwin H. and Meyne, Julianne},
abstractNote = {Determining orientation and direction of DNA sequences. A method by which fluorescence in situ hybridization can be made strand specific is described. Cell cultures are grown in a medium containing a halogenated nucleotide. The analog is partially incorporated in one DNA strand of each chromatid. This substitution takes place in opposite strands of the two sister chromatids. After staining with the fluorescent DNA-binding dye Hoechst 33258, cells are exposed to long-wavelength ultraviolet light which results in numerous strand nicks. These nicks enable the substituted strand to be denatured and solubilized by heat, treatment with high or low pH aqueous solutions, or by immersing the strands in 2.times.SSC (0.3M NaCl+0.03M sodium citrate), to name three procedures. It is unnecessary to enzymatically digest the strands using Exo III or another exonuclease in order to excise and solubilize nucleotides starting at the sites of the nicks. The denaturing/solubilizing process removes most of the substituted strand while leaving the prereplication strand largely intact. Hybridization of a single-stranded probe of a tandem repeat arranged in a head-to-tail orientation will result in hybridization only to the chromatid with the complementary strand present.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

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