Export of large molecules from the cell

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FAQs

What is used to export large molecules from the cell?

The primary mechanism used to export large molecules from the cell is called exocytosis.

How does exocytosis facilitate the export of large molecules?

Exocytosis involves the fusion of transport vesicles with the cell membrane, allowing the contents of the vesicles to be released outside the cell.

Are there any specific proteins involved in exocytosis?

Yes, several proteins participate in the process of exocytosis, including SNARE proteins, Rab GTPases, and soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs).

What is the role of SNARE proteins in exocytosis?

SNARE proteins play a crucial role in facilitating the fusion of transport vesicles with the cell membrane during exocytosis. They help bring the vesicle close to the target membrane and enable the fusion of the lipid bilayers.

Can you provide an example of a large molecule exported through exocytosis?

One example of a large molecule exported via exocytosis is a protein synthesized in the endoplasmic reticulum (ER) and transported to the cell membrane for secretion into the extracellular space.

Are there any other mechanisms involved in exporting large molecules from the cell?

While exocytosis is the primary mechanism, there are other specialized processes for exporting specific large molecules. For example, some proteins are transported across the cell membrane through protein channels or transporters, and certain molecules may be exported via specific pumps or carriers.