Journal
CURRENT OPINION IN CELL BIOLOGY
Volume 17, Issue 4, Pages 362-368Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.ceb.2005.06.005
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The endoplasmic reticulum (ER) is an extensive three-dimensional network that stretches from the inner nuclear envelope to the cell cortex with a single, continuous membrane and a single, continuous lumen. Yet the ER contains specialized regions that carry out unique functions. The question that immediately arises is how the ER can be compartmentalized if it is continuous, and the answer to this is that cellular landmarks with unique sub-cellular distributions impose non-uniformity on the ER from outside, creating structural and functional sub-domains of the ER.
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