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- W2020471873 abstract "A series of biochemical, staining and electron microscopy techniques were utilized to investigate the mechanisms of C- and G-banding. These led to the following conclusions. 1. The treatment of fixed chromosomes with 0.07 N NaOH for 30 to 180 sec removes from 16 to 81% of the DNA from the chromosomes. 2. On average, the complete C-band technique removes 60% of the DNA. 3. This DNA is preferentially extracted from the non-C-band regions. 4. In marked contrast to this, all G-band techniques (except 1) removed less than 9% of the chromosomal DNA. 5. Most of the G-band techniques, including those using trypsin, remove very little protein from the chromosomes. 6. Feulgen staining indicated that neither C- nor G-banding can be explained on the basis of different amounts of DNA along the length of the chromatid. 7. Treatment of chromosomes with alkali or prolonged treatment with trypsin tends to destroy G-bands, while C-bands remain. 8. The combined use of acridine orange and Giemsa staining indicate that, (a) repetitious DNA in situ renatures in seconds while non-repetitious DNA renatures in minutes; (b) Neither C- nor G-banding depends upon the differential renaturation of DNA for its effect. 9. G-banding is more delicate and relatively mild conditions allow staining of both C- and G-bands. To obtain only C-bands the chromosome must be treated more harshly to disrupt or destroy the G-bands. 10. DNA-non histone protein interactions probably play an important role in the production of both C- and G-banding." @default.
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- W2020471873 date "1973-03-01" @default.
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- W2020471873 title "The mechanism of C- and G-banding of chromosomes" @default.
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- W2020471873 doi "https://doi.org/10.1016/0014-4827(73)90601-0" @default.
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