1. Relating centromeric topography in fixed human chromosomes to α-satellite DNA and CENP-B distribution.
- Author
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Khan WA, Chisholm R, Tadayyon S, Subasinghe A, Norton P, Samarabandu J, Johnston LJ, Knoll JH, and Rogan PK
- Subjects
- Cell Line, Tumor, Centromere genetics, Centromere Protein B genetics, Chromatin genetics, Chromatin metabolism, Chromosomes, Human, Pair 17 genetics, Chromosomes, Human, Pair 17 metabolism, DNA Probes metabolism, DNA, Satellite genetics, Fluorescent Antibody Technique, Humans, In Situ Hybridization, Fluorescence methods, Lymphocytes cytology, Metaphase, Microscopy, Atomic Force, Tissue Fixation methods, Centromere metabolism, Centromere Protein B metabolism, DNA, Satellite metabolism
- Abstract
Despite extensive analyses on the centromere and its associated proteins, detailed studies of centromeric DNA structure have provided limited information about its topography in condensed chromatin. We have developed a method with correlative fluorescence light microscopy and atomic force microscopy that investigates the physical and structural organization of α-satellite DNA sequences in the context of its associated protein, CENP-B, on human metaphase chromosome topography. Comparison of centromeric DNA and protein distribution patterns in fixed homologous chromosomes indicates that CENP-B and α-satellite DNA are distributed distinctly from one another and relative to observed centromeric ridge topography. Our approach facilitates correlated studies of multiple chromatin components comprising higher-order structures of human metaphase chromosomes., (Copyright © 2013 S. Karger AG, Basel.)
- Published
- 2013
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