Zoology: General

A Dictionary of Biology A Dictionary of Plant Sciences A Dictionary of Zoology A Dictionary of Plant Sciences Further reading

nuclear envelope

A Dictionary of Biology | 2004 | Copyright

nuclear envelope The double membrane that separates the nucleoplasm (see nucleus) of a cell from the cytoplasm. The membranes consist of lipid bilayers that are separated by a perinuclear space (or compartment). The outer membrane is continuous with the rough endoplasmic reticulum and is structurally and functionally distinct from the inner membrane. The envelope is perforated at intervals by nuclear pores, which provide a channel for the selective transfer of water-soluble molecules between the nucleus and the cytoplasm. Each nuclear pore is surrounded by a disc-shaped structure (nuclear pore complex) consisting of an octagonal arrangement of eight protein granules.

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nuclear envelope

A Dictionary of Plant Sciences | 1998 | | Copyright

nuclear envelope (nuclear membrane) The structure that separates the nucleus of eukaryotic cells from the cytoplasm. It comprises 2 unit membranes each 10nm thick, separated by a perinuclear space of 10–40nm. At intervals, the 2 membranes are fused around the edges of circular pores (nuclear pores) which allow for the selective passage of materials into and out of the nucleus.

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MICHAEL ALLABY. "nuclear envelope." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "nuclear envelope." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O7-nuclearenvelope.html

MICHAEL ALLABY. "nuclear envelope." A Dictionary of Plant Sciences. 1998. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-nuclearenvelope.html

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nuclear envelope

A Dictionary of Zoology | 1999 | | Copyright

nuclear envelope (nuclear membrane) The structure that separates the nucleus of eukaryotic cells from the cytoplasm. It comprises two unit membranes each 10 nm thick separated by a perinuclear space of 10–40 nm. At intervals, the two membranes are fused around the edges of circular pores which allow for the selective passage of materials into and out of the nucleus.

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MICHAEL ALLABY. "nuclear envelope." A Dictionary of Zoology. 1999. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "nuclear envelope." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O8-nuclearenvelope.html

MICHAEL ALLABY. "nuclear envelope." A Dictionary of Zoology. 1999. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-nuclearenvelope.html

Learn more about citation styles