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. 2001 Apr 30;153(3):479–490. doi: 10.1083/jcb.153.3.479

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© 2001 The Rockefeller University Press

This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).

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Ultrastructural analysis of a HeLa cell expressing B1Δrod by thin section EM. (A) Low magnification view of a whole nucleus. Bar, 1 μm. *Concentric membrane structure. (B–E) High magnification views. Bars, 300 nm. (B and C) A double membrane encloses the dense chromatin regions within lobules. Cytoplasm (C) and nucleus (N) are indicated. Arrowheads delineate nuclear pores. (D) Views of two concentric membrane structures in the cytoplasm. (E) Arrowheads delineate nuclear pores; *concentric membrane contained within the NE.