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زیست شناسی::
پروتئین ترشحی
(A) A signal recognition par ticle (SRP) binds to the signal sequence of a secretory protein.
(C) The secretory protein is translocated into the lumen of the ER, and a signal peptidase removes the signal sequence.
(D) The secretory protein is folded, partially modified, and packaged in a transport vesicle intended for the Golgi network.
(E) The ERreleased vesicle carrying the secretory protein enters the Golgi network at the cis face and passes through the Golgi stack where it is further modified.
The secretory transport vesicle fuses with the plasma membrane and releases the secretory protein to the extracellular environment.
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