Difference between ser and rer pdf
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- Endoplasmic reticulum
- A morphometric study of the variations in subcellular structures of rat hepatocytes during 24 hours
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- Rough endoplasmic reticulum
The endoplasmic reticulum ER is, in essence, the transportation system of the eukaryotic cell, and has many other important functions such as protein folding. 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 difference lies between the two is that the Smooth Endoplasmic Reticulum is not bounded by the ribosomes and is known for storing the lipids and proteins. Meanwhile, the Rough Endoplasmic Reticulum is bounded by the ribosomes and store proteins. The another most essential component of the eukaryotic cell is the Endoplasmic Reticulum or ER. It occupies almost 10 percent of the total cell volume. ER is of two type smooth and rough. Though both share some common features too but differ in some.
A morphometric study of the variations in subcellular structures of rat hepatocytes during 24 hours
The endoplasmic reticulum ER is a key organelle of the secretion pathway involved in the synthesis of both proteins and lipids destined for multiple sites within and without the cell. The ER functions to both co- and post-translationally modify newly synthesized proteins and lipids and sort them for housekeeping within the ER and for transport to their sites of function away from the ER. In addition, the ER is involved in the metabolism and degradation of specific xenobiotics and endogenous biosynthetic products. A variety of proteomics studies have been reported on different subcompartments of the ER providing an ER protein dictionary with new data being made available on many protein complexes of relevance to the biology of the ER including the ribosome, the translocon, coatomer proteins, cytoskeletal proteins, folding proteins, the antigen-processing machinery, signaling proteins and proteins involved in membrane traffic. This review examines proteomics and cytological data in support of the presence of specific molecular machines at specific sites or subcompartments of the ER. The ER is a dynamic organelle essential for cell life. The NE forms a shell around the nucleus.
Answer · Difference between smooth and Rough endoplasmic Reticulum (SER/RER) SER RER 1. Presence of ribosomes absent present 2. origin from the.
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Structural organization of the endoplasmic reticulum. We can think of our rough endoplasmic reticulum as the primary protein folding and processing centre within the cell. Difference between smooth and rough endoplasmic reticulum. The text has been revised and updated to provide comprehensive coverage of the latest syllabuses.
Subcellular structures of hepatocytes in periportal and perivenous zones were examined during 24 h. The volume, surface and numerical profile densities of cytoplasmic organelles were analysed morphometrically.
Rough endoplasmic reticulum
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Rough endoplasmic reticulum RER , series of connected flattened sacs, part of a continuous membrane organelle within the cytoplasm of eukaryotic cells , that plays a central role in the synthesis of proteins. The rough endoplasmic reticulum RER is so named for the appearance of its outer surface, which is studded with protein-synthesizing particles known as ribosomes. This feature distinguishes it superficially and functionally from the other major type of endoplasmic reticulum ER , the smooth endoplasmic reticulum SER , which lacks ribosomes and is involved in the synthesis and storage of lipids. RER occurs in both animal and plant cells. The RER membrane is continuous with the nuclear envelope, which surrounds the cell nucleus. The RER is also located near the Golgi apparatus , which transports, modifies, and packages proteins for delivery to targeted destinations. Many proteins that are synthesized in the RER are packaged into vesicles and transported to the Golgi apparatus.
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