The organelle called 'endoplasmic reticulum' occurs in both plants and animals and is a very important manufacturing site for lipids (fats) and many proteins. Many of these products are made for and exported to other organelles. read more
The presence of these ribosomes on the outer layer of the RER distinguishes it from smooth endoplasmic reticulum, which is known as the SER. In addition to producing proteins, the RER plays an essential role in many other functions. read more
Endoplasmic reticulum is a network of tubules, vesicles and sacs that are interconnected. They may serve specialized functions in the cell including protein synthesis, sequestration of calcium, production of steroids, storage and production of glycogen, and insertion of membrane proteins. read more
Granular or rough endoplasmic reticulum is ER studded with 80S ribosomes in cytosol of eukaryotes. The granular ER takes part in synthesis, storage, package, and secretion (export) of proteins like peptide hormones, enzymes, antibodies, blood clotting proteins, mucus, collagen, etc. read more