Chapter title |
Quantitative Immunofluorescence Analysis of Nucleolus-Associated Chromatin
|
---|---|
Chapter number | 5 |
Book title |
The Nucleolus
|
Published in |
Methods in molecular biology, January 2016
|
DOI | 10.1007/978-1-4939-3792-9_5 |
Pubmed ID | |
Book ISBNs |
978-1-4939-3790-5, 978-1-4939-3792-9
|
Authors |
Stefan Dillinger, Attila Németh, Dillinger, Stefan, Németh, Attila |
Editors |
Attila Németh |
Abstract |
The nuclear distribution of eu- and heterochromatin is nonrandom, heterogeneous, and dynamic, which is mirrored by specific spatiotemporal arrangements of histone posttranslational modifications (PTMs). Here we describe a semiautomated method for the analysis of histone PTM localization patterns within the mammalian nucleus using confocal laser scanning microscope images of fixed, immunofluorescence stained cells as data source. The ImageJ-based process includes the segmentation of the nucleus, furthermore measurements of total fluorescence intensities, the heterogeneity of the staining, and the frequency of the brightest pixels in the region of interest (ROI). In the presented image analysis pipeline, the perinucleolar chromatin is selected as primary ROI, and the nuclear periphery as secondary ROI. |
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