Ordered phases of DNA in vivo and in vitro

Françoise Livolant

Physica A: Statistical Mechanics and its Applications, 1991, vol. 176, issue 1, 117-137

Abstract: In vitro, pure DNA forms multiple liquid crystalline phases when the polymer concentration is increased: precholesteric organization, cholesteric phase and columnar hexagonal phase. Similar organizations of chromatin can be found in vivo: hexagonal packing in bacteriophages and certain sperm heads, cholesteric organization in dinoflagellate chromosomes, bacterial nucleoids and mitochondrial DNA, helical-shaped chromosomes in many species. The different forms of condensed chromatin seem to be related to different local concentrations of DNA. In the highly condensed forms, chromatin is inactive and the double stranded DNA molecule is linear with small amounts of associated proteins.

Date: 1991
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:176:y:1991:i:1:p:117-137

DOI: 10.1016/0378-4371(91)90436-G

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