核膜孔
(核膜孔複合体 から転送)
出典: フリー百科事典『ウィキペディア(Wikipedia)』 (2021/09/25 03:51 UTC 版)
核膜孔(かくまくこう、英:Nuclear pore)とは、核の内外を連絡する穴である。真核生物の核膜の内膜と外膜が融合する場にあり、核と細胞質間の物質の移動はこの核膜孔を介して行われる。核膜孔には核膜孔複合体が位置し、これは8個のサブユニットが回転対称に配置された巨大なタンパク質複合体である。脊椎動物の細胞の核膜には約1000個の核膜孔複合体が存在するが、その数は細胞種や生活環の段階に依存して変動する[1]。
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