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Perceiving mitosis in eukaryotic cells.

H Y Kim1, D Byrne, P Hwang

  • 1Department of Biochemistry, University of Kansas, Lawrence 66045.

In Vitro Cellular & Developmental Biology : Journal of the Tissue Culture Association
|February 1, 1988
PubMed
Summary
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A new method uses Zenker's fixative and a histone H2b antibody to selectively label cells in mitosis (M) phase. This technique allows for detailed visualization of mitotic patterns in various species and tissues.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Immunology

Background:

  • Visualizing specific cell cycle phases is crucial for understanding cell division.
  • Traditional methods for identifying mitotic cells can be complex or lack specificity.

Purpose of the Study:

  • To develop a sensitive and selective method for identifying eukaryotic cells in mitosis (M) phase.
  • To utilize indirect immunofluorescence for visualizing mitotic chromatin.

Main Methods:

  • Employing Zenker's fixative to selectively permeabilize the plasma membrane while preserving nuclear envelope integrity in interphase cells.
  • Using a monoclonal antibody (MC 21) targeting histone H2b, a major chromatin constituent.
  • Applying indirect immunofluorescence to detect antibody binding to chromatin in M-phase cells where the nuclear envelope is absent.

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Main Results:

  • The method selectively labels M-phase cells due to antibody access to chromatin only when the nuclear envelope is disrupted.
  • Details of chromatin figures within M-phase cells are observable at high magnification.
  • The monoclonal antibody MC 21 demonstrates cross-reactivity with chromatin across various species.
  • The technique is effective for cells in culture and adaptable for complex tissue systems, including chick embryos.

Conclusions:

  • This indirect immunofluorescence method provides a sensitive and selective approach for visualizing eukaryotic cells in mitosis.
  • The technique allows for detailed analysis of mitotic patterns and chromatin structures.
  • The method's versatility makes it applicable to diverse biological systems for cell cycle research.