Chylomicron
Nascent chylomicrons

After synthesis in the smooth ER, nascent chylomicrons are transported to the Golgi apparatus by SAR1B proteins. The transport of nascent chylomicrons within the secretory pathway is facilitated by protein transport vesicles (PCTVs). PCTVs are uniquely equipped with v-SNARE and VAMP-7 proteins, which aid in their fusion with the cis-Golgi compartment. This transport is facilitated by COPII proteins, including Sec23/24, which select cargo and facilitate vesicle budding from the ER membrane.
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