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Prokaryotic and eukaryotic chromosomes: what's the difference?

โœ Scribed by Arnold J. Bendich; Karl Drlica

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
97 KB
Volume
22
Category
Article
ISSN
0265-9247

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โœฆ Synopsis

It is widely held that the profound differences in cellular architecture between prokaryotes and eukaryotes, in particular the housing of eukaryotic chromosomes within a nuclear membrane, also extends to the properties of their chromosomes. When chromosomal multiplicity, ploidy, linearity, transcriptional silencing, partitioning, and packaging are considered, no consistent association is found between any of these properties and the presence or absence of a nuclear membrane. Some of the perceived differences can be attributed to cytological limitations imposed by the small size of bacterial nucleoids and the arbitrary choice of representative organisms for comparison. We suggest that the criterion of nucleosome-based packaging of chromosomal DNA may be more useful than the prokaryote/eukaryote dichotomy for inferring the broadest phylogenetic relationships among organisms.

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