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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.
The rough endoplasmic reticulum is so named because the cytoplasmic surface is covered with ribosomes, giving it a bumpy appearance when viewed through an electron microscope. The smooth ER appears smooth since its cytoplasmic surface lacks ribosomes. [27]
Synthesis of proteins is by the rough endoplasmic reticulum (RER), and both the rough and smooth endoplasmic reticulum (SER) are involved in secretion of the proteins formed. [citation needed] The endoplasmic reticulum (ER) is involved in conjugation of proteins to lipid and carbohydrate moieties synthesized by, or modified within, the hepatocytes.
Secretory pathway diagram, including nucleus, endoplasmic reticulum and golgi apparatus. Nuclear membrane; Nuclear pore; Rough endoplasmic reticulum (rER) Smooth endoplasmic reticulum (sER) Ribosome attached to rER; Macromolecules; Transport vesicles; Golgi apparatus; Cis face of Golgi apparatus; Trans face of Golgi apparatus; Cisternae of ...
redid the whole smooth endoplasmic reticulum and the golgi aparatus. adedmore clear ribosomes. arranged centrioles in a centrosome with microtubula. aactin filaments and intermediate filaments. may still have to arrange text. 19:58, 5 September 2011: 553 × 404 (182 KB) LadyofHats
Rough (containing ribosomes) and smooth (without ribosomes) microsomes are made from the endoplasmic reticulum through cell disruption. These microsomes have an inside that is exactly the same as the endoplasmic reticulum lumen. Both forms of microsomes can be purified by a process known as equilibrium density centrifugation. Rough and smooth ...
translation and folding of new proteins (rough endoplasmic reticulum), expression of lipids (smooth endoplasmic reticulum) single-membrane compartment: all eukaryotes: rough endoplasmic reticulum is covered with ribosomes (which are bound to the ribosome membrane), has folds that are flat sacs; smooth endoplasmic reticulum has folds that are ...
The acidophilic cytoplasm usually contains numerous membrane-bound lipid droplets and large amounts of smooth endoplasmic reticulum (SER). [4] Besides the abundance of SER with scattered patches of rough endoplasmic reticulum, several mitochondria are also prominent within the cytoplasm.