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Endoplasmic reticulum and Golgi apparatus

Two organelles are very important for the packaging and delivery of proteins to different parts of the cell:

  • The endoplasmic reticulum (ER) is a large network of membrane compartments. It is the largest organelle in most animal and plant cells.

    Newly made proteins enter the ER. When inside the ER, proteins can be modified. They are then delivered to the Golgi body.

  • The Golgi apparatus (Golgi body) exports proteins to other parts of the cell.

    The Golgi apparatus is a group of stacked membranes. Proteins are shuttled between membranes in small organelles called vesicles.

    The Golgi apparatus can be thought of as the postal centre of the cell. The ER puts the stamps on the proteins.
    The Golgi apparatus can be thought of as the postal centre of the cell. The ER puts the stamps on the proteins.