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Chromosoma

, Volume 77, Issue 3, pp 277–283 | Cite as

Chromatin rings as products of chromatin diminution in Cyclops

  • Sigrid Beermann
  • Günther F. Meyer
Article

Abstract

Nuclei from the interphase preceding the 6th cleavage (=first diminution) division of Cyclops furcifer were subjected to a micro-spreading technique (Counce and Meyer, 1973) and examined by electron microscopy. In some preparations numerous chromatin rings formed by 250–300 Å fibers were discovered in sizes ranging from 0.25 μm to more than 6 μm. These structures are assumed to represent the primary products of chromatin diminution.

Keywords

Electron Microscopy Developmental Biology Chromatin Diminution Chromatin Ring 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Beermann, S.: A quantitative study of chromatin diminution in embryonic mitosis of Cyclops furcifer. Genetics 54, 567–576 (1966)Google Scholar
  2. Beermann, S.: The diminution of heterochromatic chromosomal segments in Cyclops (Crustacea, Copepoda). Chromosoma (Berl.) 60, 297–344 (1977)Google Scholar
  3. Counce, S.J., Meyer, G.F.: Differentiation of the synaptonemal complex and the kinetochore in Locusta spermatocytes studied by the whole mount electron microscopy. Chromosoma (Berl.) 44, 231–253 (1973)Google Scholar
  4. Golomb, H.M., Bahr, G.F.: Electron microscopy of human interphase nuclei. Determination of total dry mass and DNA packing ratio. Chromosoma (Berl.) 46, 233–245 (1974)Google Scholar
  5. Meyer, G.F., Lipps.: Chromatin elimination in the hypotrichous ciliate Stylonychia mytilus. Chromosoma (Berl.) 77, 285–297 (1980)Google Scholar

Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • Sigrid Beermann
    • 1
  • Günther F. Meyer
    • 1
  1. 1.Max-Planck-Institut für BiologieTübingen 1Federal Republic of Germany

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