nuclear envelope

nuclear envelope
the structure enclosing the cell nucleus and separating it from the cytoplasm, consisting of two concentric lipid bilayers (the inner and outer membranes) separated by a 30-nm wide perinuclear space. The outer membrane is continuous with the rough endoplasmic reticulum, and nuclear pore complexes bridging both membranes provide communication between the nucleus and the cytoplasm. Called also nuclear membrane.

Nuclear envelope, showing the inner and outer membrane and a nuclear pore (electron micrograph).

Medical dictionary. 2011.

Look at other dictionaries:

  • Nuclear envelope — Human cell nucleus A nuclear envelope (NE) (also known as the perinuclear envelope, nuclear membrane, nucleolemma or karyotheca) is a double lipid bilayer that encloses the genetic material in eukaryotic cells. The nuclear envelope also serves as …   Wikipedia

  • nuclear envelope — branduolio apvalkalėlis statusas T sritis augalininkystė apibrėžtis Dviguba membrana, atskirianti ląstelės branduolį nuo citoplazmos. atitikmenys: angl. nuclear envelope rus. ядерная оболочка …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • nuclear envelope — Membrane system that surrounds the nucleus of eukaryotic cells. Consists of inner and outer membranes separated by perinuclear space and perforated by nuclear pores. The term should be used in preference to the term nuclear membrane which is… …   Dictionary of molecular biology

  • nuclear envelope — noun see nuclear membrane …   New Collegiate Dictionary

  • nuclear envelope — Double layered membrane separating the nucleoplasm from the cytoplasm; nuclear membrane …   Dictionary of invertebrate zoology

  • nuclear envelope — (nu kle ar) The complex double membrane structure forming the outer boundary of the eucaryotic nucleus. It is covered by pores through which substances enter and leave the nucleus …   Dictionary of microbiology

  • nuclear membrane — n a double membrane enclosing a cell nucleus and having its outer part continuous with the endoplasmic reticulum called also karyotheca * * * 1. either of the membranes, inner and outer, comprising the 2. nuclear envelope. nuclear envelope …   Medical dictionary

  • nuclear membrane — n. the double layered membrane of the nucleus of a cell, separating the nucleoplasm from the cytoplasm, that is permeable to certain molecules, esp. DNA, RNA, and ATP: now often nuclear envelope …   English World dictionary

  • Nuclear lamina — The nuclear lamina is a dense ( 30 to 100 nm thick) fibrillar network inside the nucleus of a eukaryotic cell. It is composed of intermediate filaments and membrane associated proteins. Besides providing mechanical support, the nuclear lamina… …   Wikipedia

  • Nuclear pore — Diagram of human cell nucleus. Nuclear pore labeled at bottom left …   Wikipedia

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