Stains & CD markers
Phosphohistone H3

Topic Completed: 1 June 2005

Minor changes: 23 July 2021

Copyright: 2002-2021,, Inc.

PubMed Search: Phosphohistone H3 [title]

Nat Pernick, M.D.
Page views in 2020: 1,394
Page views in 2021 to date: 1,542
Cite this page: Pernick N. Phosphohistone H3. website. Accessed October 17th, 2021.
Definition / general
  • Core histone protein that is major constituent of chromatin; marker of cells in late G2 and M phase
  • Nuclear stain
  • Count phosphohistone H3+ objects (nuclei and mitoses) in 10 adjacent fields with 40x objective, in invasive epithelial areas with highest phosphohistone H3 staining
  • Ignore nuclei with fine granular staining
Uses by pathologists
Microscopic (histologic) images

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Normal colonic mucosa

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Ki67, phosphohistone H3 and survivin

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Grade 3 breast carcinoma

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Thick cutaneous melanomas

Positive staining - disease
  • Mitotic activity
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