Английская Википедия:Dinokaryon
Шаблон:Short description A dinokaryon is a 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, or "dinomitosis".[1] The mitotic spindle is extranuclear.[2]
Histones are absent.[3] 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.[4] However, histone-like proteins of bacterial origins are found in the coding regions at periphery of the dinokaryon's chromosomes.[5]
References
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ 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.
- ↑ 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
- ↑ Шаблон:Cite journal