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Nuclear Stain

DAPI Nuclear Stain

Universal nuclear counterstain for cell detection

Definition
A blue-fluorescent DNA-binding dye that labels all cell nuclei in a tissue section. It is a universal counterstain for total cell counts and the reference channel for nuclear segmentation algorithms.
Universal Label
Stains all nuclei regardless of cell type
Segmentation Foundation
The primary channel for nuclear detection algorithms

Role in Brain Imaging

DAPI (4',6-diamidino-2-phenylindole) binds to AT-rich regions of DNA, labeling every nucleus in the tissue section. In PanoBrain workflows:

  • Total cell reference: provides the denominator for calculating percent positive cells
  • Segmentation anchor: nuclear segmentation algorithms operate on the DAPI channel to identify individual cells
  • Tissue architecture: nuclear density patterns reveal brain region boundaries even without atlas overlay

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