Abstract
Though hundreds to thousands of reports have described the distribution of B chromosomes among diverse eukaryote groups, a comprehensive theory of their biological role has not yet clearly emerged. B chromosomes are classically understood as a sea of repetitive DNA sequences that are poor in genes and are maintained by a parasitic-drive mechanism during cell division. Recent developments in high-throughput DNA/RNA analyses have increased the resolution of B chromosome biology beyond those of classical and molecular cytogenetic methods; B chromosomes contain many transcriptionally active sequences, including genes, and can modulate the activity of autosomal genes. Furthermore, the most recent knowledge obtained from omics analyses, which is associated with a systemic view, has demonstrated that B chromosomes can influence cell biology in a complex way, possibly favoring their own maintenance and perpetuation.
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Acknowledgment
This work was supported by grants from São Paulo Research Foundation (13/04533-3), the National Council for Scientific and Technological Development (474684/2013-0, 301728/2011-9), and São Paulo State University (0045/021/13-PROPe/CDC).
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This work was supported by grants from São Paulo Research Foundation (13/04533-3), the National Council for Scientific and Technological Development (474684/2013-0, 301728/2011-9), and São Paulo State University (0045/021/13-PROPe/CDC).
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This article is related to the 21st International Chromosome Conference (Foz do Iguaçu, Brazil, July 10–13, 2016).
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Valente, G.T., Nakajima, R.T., Fantinatti, B.E.A. et al. B chromosomes: from cytogenetics to systems biology. Chromosoma 126, 73–81 (2017). https://doi.org/10.1007/s00412-016-0613-6
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DOI: https://doi.org/10.1007/s00412-016-0613-6