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Structural differences in the chromatin from compartmentalized cells of the sea urchin embryo: differential nuclease accessibility of micromere chromatin.

Publication ,  Journal Article
Cognetti, G; Shaw, BR
Published in: Nucleic acids research
November 1981

The chromatin structure of three cell types isolated from the 16-cell stage sea urchin embryo has been probed with micrococcal nuclease. In micromeres, the four small cells at the vegetal pole, the chromatin is found to be considerably more resistant to degradation by micrococcal nuclease than chromatin in the larger mesomere and macromere cells which undergo more cellular divisions and are committed to different developmental fates. The micromeres show an order of magnitude decrease in the initial digestion rate and a limit digest value which is one third that of the larger blastomeres; both observations are suggestive of the formation of a more condensed chromatin structure during the process of commitment, or as the rate of cell division decreases. The decreased sensitivity to nuclease for micromeres is similar to results reported for sperm and larval stages of development.

Duke Scholars

Published In

Nucleic acids research

DOI

EISSN

1362-4962

ISSN

0305-1048

Publication Date

November 1981

Volume

9

Issue

21

Start / End Page

5609 / 5621

Related Subject Headings

  • Sea Urchins
  • Kinetics
  • Fertilization
  • Female
  • Embryo, Nonmammalian
  • Developmental Biology
  • DNA
  • Chromatin
  • Cells, Cultured
  • Animals
 

Citation

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Cognetti, G., & Shaw, B. R. (1981). Structural differences in the chromatin from compartmentalized cells of the sea urchin embryo: differential nuclease accessibility of micromere chromatin. Nucleic Acids Research, 9(21), 5609–5621. https://doi.org/10.1093/nar/9.21.5609
Cognetti, G., and B. R. Shaw. “Structural differences in the chromatin from compartmentalized cells of the sea urchin embryo: differential nuclease accessibility of micromere chromatin.Nucleic Acids Research 9, no. 21 (November 1981): 5609–21. https://doi.org/10.1093/nar/9.21.5609.
Cognetti, G., and B. R. Shaw. “Structural differences in the chromatin from compartmentalized cells of the sea urchin embryo: differential nuclease accessibility of micromere chromatin.Nucleic Acids Research, vol. 9, no. 21, Nov. 1981, pp. 5609–21. Epmc, doi:10.1093/nar/9.21.5609.
Journal cover image

Published In

Nucleic acids research

DOI

EISSN

1362-4962

ISSN

0305-1048

Publication Date

November 1981

Volume

9

Issue

21

Start / End Page

5609 / 5621

Related Subject Headings

  • Sea Urchins
  • Kinetics
  • Fertilization
  • Female
  • Embryo, Nonmammalian
  • Developmental Biology
  • DNA
  • Chromatin
  • Cells, Cultured
  • Animals