WordNet

a part of the cell containing DNA and RNA and responsible for growth and reproduction (同)cell_nucleus, karyon
(astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail
any histologically identifiable mass of neural cell bodies in the brain or spinal cord
the positively charged dense center of an atom
(genetics) the diploid cell resulting from the union of a haploid spermatozoon and ovum (including the organism that develops from that cell) (同)fertilized_ovum

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1. 大腸癌の分子遺伝学 molecular genetics of colorectal cancer
2. 同名半盲 homonymous hemianopia
3. 抗核抗体染色パターンおよび関連自己抗体の臨床的意義 clinical significance of antinuclear antibody staining patterns and associated autoantibodies
4. 体外受精（IFV） in vitro fertilization
5. パーキンソン病のデバイス補助療法と手術療法 device assisted and surgical treatments for parkinson disease

Ultrastructural and structural characterization of zygotes and embryos during development in Sargassum cymosum (Phaeophyceae, Fucales).

Rover T1, Simioni C, Hable W, Bouzon ZL.
Protoplasma.Protoplasma.2015 Mar;252(2):505-18. doi: 10.1007/s00709-014-0696-y. Epub 2014 Sep 25.
This study investigates the pattern and performance of cellular structures during the early development of zygotes and embryos of Sargassum cymosum. The early development S. cymosum germlings has already been characterized and compared with the pattern of development established for all fucoid algae
PMID 25252885

ING2 (inhibitor of growth protein-2) plays a crucial role in preimplantation development.

Zhou L1, Wang P1, Zhang J1, Heng BC2, Tong GQ3.
Zygote (Cambridge, England).Zygote.2015 Feb 12:1-9. [Epub ahead of print]
Summary ING2 (inhibitor of growth protein-2) is a member of the ING-gene family and participates in diverse cellular processes involving tumor suppression, DNA repair, cell cycle regulation, and cellular senescence. As a subunit of the Sin3 histone deacetylase complex co-repressor complex, ING2 bind
PMID 25672483

Karyogamy in rice zygotes: Actin filament-dependent migration of sperm nucleus, chromatin dynamics, and de novo gene expression.

Ohnishi Y1, Okamoto T.
Plant signaling & behavior.Plant Signal Behav.2015 Feb;10(2):e989021. doi: 10.4161/15592324.2014.989021.
In angiosperms, the fusion of a sperm cell with an egg cell, termed plasmogamy, triggers egg activation. Then, karyogamy, migration of the sperm nucleus toward the egg nucleus and their subsequent nuclear fusion, progresses, and de novo gene expression from the zygotic genome is initiated for early
PMID 25723729