Editing Symbiogenesis (section)

=== Endomembrane system ===

[[File:Endomembrane system diagram en.svg|thumb|upright=1.5|Diagram of endomembrane system in eukaryotic cell]]

Modern eukaryotic cells use the endomembrane system to transport products and wastes in, within, and out of cells. The membrane of nuclear envelope and endomembrane vesicles are composed of similar membrane proteins.<ref>{{cite journal |last1=Liashkovich |first1=Ivan |last2=Shahin |first2=Victor |title=Functional implication of the common evolutionary origin of nuclear pore complex and endomembrane management systems |journal=[[Seminars in Cell and Developmental Biology]] |volume=68 |pages=10–17 |date=August 2017 |pmid=28473267 |doi=10.1016/j.semcdb.2017.04.006 }}</ref> These vesicles also share similar membrane proteins with the organelle they originated from or are traveling towards.<ref name="Howe2008" /> This suggests that what formed the nuclear membrane also formed the endomembrane system. Prokaryotes do not have a complex internal membrane network like eukaryotes, but they could produce extracellular vesicles from their outer membrane.<ref name=":2"/> After the early prokaryote was consumed by a proto-eukaryote, the prokaryote would have continued to produce vesicles that accumulated within the cell.<ref name=":2"/> Interaction of internal components of vesicles may have led to the [[endoplasmic reticulum]] and the [[Golgi apparatus]], both being parts of the endomembrane system.<ref name=":2"/>