nuclear envelope


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envelope

 [en´vĕ-lōp]
1. an encompassing structure or membrane.
2. in virology, the outer lipoprotein coat of a large virus, surrounding the capsid and usually furnished, at least partially, by the host cell. Called also peplos.
3. in bacteriology, the cell wall and the plasma membrane considered together.
nuclear envelope the condensed double layer of lipids and proteins enclosing the cell nucleus and separating it from the cytoplasm; its two concentric membranes, inner and outer, are separated by a perinuclear space.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

nu·cle·ar en·ve·lope

the double membrane at the boundary of the nucleoplasm; it has regularly spaced pores covered by a disclike nuclear pore complex and a space or cisterna about 150 Ǻ wide between the two membranes; the outer membrane is continuous at intervals with the rough endoplasmic reticulum.
Farlex Partner Medical Dictionary © Farlex 2012

nuclear envelope

The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

nu·cle·ar en·vel·ope

(nū'klē-ăr en'vĕ-lōp)
The double membrane at the boundary of the nucleoplasm; it has regularly spaced pores covered by a disclike nuclear pore complex and a space or cisterna about 150 Å wide between the two layers; the outer membrane is continuous at intervals with the endoplasmic reticulum.
Synonym(s): nuclear membrane.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

nuclear envelope

The double membrane, with perforations (pores), surrounding a cell nucleus. The outer membrane extends into the endoplasmic reticulum. The pores allow transport of macromolecules in both directions.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
Importin [alpha] is also important for nuclear envelope assembly (120) and lamin polymerization (121) as shown by in vitro nuclear assembly reactions using Xenopus egg extracts.
Abraham et al., "Lamin A/C-dependent localization of Nesprin-2, a giant scaffolder at the nuclear envelope," Molecular Biology of the Cell (MBoC), vol.
When DAG was depleted by either DGK or the phosphoinositide 5-phosphatase SKIP, nuclear envelope formation was inhibited and the ER was reorganized into multilamellar sheets.
15d) emanate from [gamma]-tubulin that closely invests the nuclear envelopes (Fig.
Nuclear lamins A and B1: Different pathways of assembly during nuclear envelope formation in living cells.
2D-ECHO, Bi-dimensional echocardiogram; BMI, body mass index; CK, creatinine kinase; CRP, c-reactive protein; CV, conduction velocity; DCM-CD, dilated eardiomyopathy with conduction defect disease; EDMD, Emery Dreifuss Muscular Dystrophy; ECG, electroeardiogram; EMG, needle electromyogram; LMNA, laminA/C; LGMD, limb girdle muscular dystrophy; LVEF, left ventricular ejection fraction; METs, metabolic equivalents; MU, motor unit; MUGA, multigated acquisition; NE, nuclear envelope; PVC's, premature ventricular contractions
"Atypical p-ANCA" in IBD and hepatobiliary disorders react with a 50-kilodalton nuclear envelope protein of neutrophils and myeloid cell lines.
NC are defined as invaginations of the nuclear envelope (NE) that traverse the nucleoplasm, thus forming a ring-like nucleus.
Health Center scientists have created Virtual Cell applications involving calcium dynamics in the neuro-blastoma cell; the calcium wave in fertilized eggs; a nuclear envelope breakdown; RNA trafficking and mito-chondrial diffusion.
Specific interactions of chromatin with nuclear envelope: positional determination within the nucleus in drosophila melanogaster.
Leydig cells have large spherical or slightly elongated nuclei, which possess prominent nuclei and frequently deep indentations of nuclear envelope. The nuclei are characterized by patches of euchromatin and heterochromatin regions with the latter usually occupying the periphery of the organelle.

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