Short note on Endoplasmic Reticulum (ER).
Short note on Endoplasmic Reticulum (ER).
The endoplasmic reticulum (ER) is an important organalle in eukaryotic cell. It plays a major role in the production, processing, and transport of proteins and lipids. The ER produces transmembrane proteins and lipids for its membrane and for many other cell components including lysosome, secretory vesicles, the golgi apparatus, the cell membrane, and plant cell vacuole.
The endoplasmic reticulum is a network of tubules and flattened sacs that serve a variety of functions in plant and animals. There are two regions of the ER that differ in both structure and function. One region is called rough ER because it has ribosome attached to the cytoplasmic side of the membrane. The other region is called smooth ER because it lacks attached ribosomes. Typically, the smooth ER is a tubule network and the rough ER is a series of flattened sacs. The space inside of the ER is called the lumen. The ER is very extensive extending from the cell membrane through the cytoplasm and forming a continuous connection with the nuclear envelope. Since the ER is connected with the nuclear envelope, the lumen of the ER and the space inside the nuclear envelope are part of the same compartment.
The endoplasmic reticulum (ER) is an important organalle in eukaryotic cell. It plays a major role in the production, processing, and transport of proteins and lipids. The ER produces transmembrane proteins and lipids for its membrane and for many other cell components including lysosome, secretory vesicles, the golgi apparatus, the cell membrane, and plant cell vacuole.
The endoplasmic reticulum is a network of tubules and flattened sacs that serve a variety of functions in plant and animals. There are two regions of the ER that differ in both structure and function. One region is called rough ER because it has ribosome attached to the cytoplasmic side of the membrane. The other region is called smooth ER because it lacks attached ribosomes. Typically, the smooth ER is a tubule network and the rough ER is a series of flattened sacs. The space inside of the ER is called the lumen. The ER is very extensive extending from the cell membrane through the cytoplasm and forming a continuous connection with the nuclear envelope. Since the ER is connected with the nuclear envelope, the lumen of the ER and the space inside the nuclear envelope are part of the same compartment.
