Abstract
Transport from the endoplasmic reticulum (ER) to the Golgi
complex requires assembly of the COPII coat complex at
ER exit sites. Recent studies have raised the question as to
whether in mammalian cells COPII coats give rise to COPIIcoated
transport vesicles or instead form ER sub-domains
that collect proteins for transport via non-coated carriers. To
establish
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