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dinokaryon : ウィキペディア英語版
dinokaryon
A dinokaryon is an eukaryotic nucleus present in dinoflagellates in which the chromosomes are fibrillar in appearance (i.e. with unmasked DNA fibrils) and are more or less continuously condensed.
The nuclear envelope does not break down during mitosis, which is thus termed closed mitosis. The mitotic spindle is extranuclear.
Histones are absent.〔FENSOME R.A., TAYLOR F.J.R., NORRIS G., SARJEANT W.A.S., WHARTON D.I. & WILLIAMS G.L. 1993. A classification of living and fossil dinoflagellates. American Museum of Natural History, Micropaleontology, Special Publication 7: 1-351.〕 However, recent EST sequencing has revealed the presence of histones in one of the closest relative to dinoflagellates, ''Perkinsus marinus'' and an early-branching dinoflagellate, ''Hematodinium'' sp. 〔 Gornik, S.G., Ford, K.L., Mulhern, T.D.,Bacic, A., McFadden, G.I., and Waller, R.F.(2012). Loss of nucleosomal DNA condensation coincides with appearance of a novel nuclear protein in dinoflagellates. Curr. Biol. 22,
2303–2312 〕
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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