What are the enzymes in endoplasmic reticulum?

The endoplasmic reticulum is a delicate membrane structure that is contiguous to the nuclear membrane and which is present in the cytoplasm. It forms an extensive net of channels throughout the cell and is classified into rough or smooth types. read more

The rough endoplasmic reticulum has a large number of ribosomes attached to the external side of its membrane. The smooth endoplasmic reticulum does not have ribosomes attached to its membrane. The main functions of the rough endoplasmic reticulum are the synthesis and storage of proteins made in the ribosomes. read more

Some enzymes in the lumen of the endoplasmic reticulum are required for processing of newly synthesized proteins. Membrane protein synthesis will be examined in chapter “Membrane Biogenesis.” The endoplasmic reticulum contains a variety of membrane lipids. read more

The endoplasmic reticulum occurs in most types of eukaryotic cells, but is absent from red blood cells and spermatozoa. There are two types of endoplasmic reticulum: rough (granular) and smooth (agranular). The outer face of the rough endoplasmic reticulum is studded with ribosomes that are the sites of protein synthesis. read more