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  2. Endomembrane system - Wikipedia

    en.wikipedia.org/wiki/Endomembrane_system

    The endomembrane system is composed of the different membranes ... The ER is made up of flattened sacs and branching tubules that are thought to interconnect, so that ...

  3. Endoplasm - Wikipedia

    en.wikipedia.org/wiki/Endoplasm

    The endoplasm, along with its granules, contains water, nucleic acids, amino acids, carbohydrates, inorganic ions, lipids, enzymes, and other molecular compounds. It is the site of most cellular processes as it houses the organelles that make up the endomembrane system, as well as those that stand alone.

  4. Endoplasmic reticulum - Wikipedia

    en.wikipedia.org/wiki/Endoplasmic_reticulum

    It is a type of organelle made up of two subunits – rough endoplasmic reticulum (RER), and smooth endoplasmic reticulum (SER). The endoplasmic reticulum is found in most eukaryotic cells and forms an interconnected network of flattened, membrane-enclosed sacs known as cisternae (in the RER), and tubular structures in the SER.

  5. Golgi apparatus - Wikipedia

    en.wikipedia.org/wiki/Golgi_apparatus

    The Golgi apparatus (/ ˈ ɡ ɒ l dʒ i /), also known as the Golgi complex, Golgi body, or simply the Golgi, is an organelle found in most eukaryotic cells. [1] Part of the endomembrane system in the cytoplasm, it packages proteins into membrane-bound vesicles inside the cell before the vesicles are sent to their destination.

  6. Endosome - Wikipedia

    en.wikipedia.org/wiki/Endosome

    Transport from late endosomes to lysosomes is, in essence, unidirectional, since a late endosome is "consumed" in the process of fusing with a lysosome (sometimes called endolysosome [23] [24]).Hence, soluble molecules in the lumen of endosomes will tend to end up in lysosomes, unless they are retrieved in some way.

  7. Cell membrane - Wikipedia

    en.wikipedia.org/wiki/Cell_membrane

    The ER, which is part of the endomembrane system, which makes up a very large portion of the cell's total membrane content. The ER is an enclosed network of tubules and sacs, and its main functions include protein synthesis, and lipid metabolism. There are 2 types of ER, smooth and rough.

  8. Organelle - Wikipedia

    en.wikipedia.org/wiki/Organelle

    They include structures that make up the endomembrane system (such as the nuclear envelope, endoplasmic reticulum, and Golgi apparatus), and other structures such as mitochondria and plastids.

  9. Membrane contact site - Wikipedia

    en.wikipedia.org/wiki/Membrane_contact_site

    The uneven distribution of sterols among the membranes of the cell organelles, depends largely on non-vesicular route of transfer.For instance, in the ER, where they are synthetised, they account for about the 5%, but they are far more concentrated in the PM, where they account for more than 30% of lipid content.