Definition of dissatisfaction noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
SUMMARY. 1  Endoplasmic reticulum is an organelle found in both eukaryotic animal and plant cells. 2  The rough ER, studded with millions of membrane bound ribosomes, is involved with the production, folding, quality control and despatch of some proteins.
ER stress and the UPR in mammals. The endoplasmic reticulum (ER) is a membranous network of branching tubules and flattened sacs that is present in all eukaryotic cells. It extends throughout the cytoplasm of the cell and is contiguous with the nuclear envelope.The ER is mainly recognized as a protein-folding factory, responsible for the biosynthesis, folding, assembly and modification of numerous soluble proteins and membrane proteins.t extends throughout the cytoplasm of the cell and is contiguous with the nuclear envelope. The ER is mainly recognized as a protein-folding factory, responsible for the biosynthesis, folding, assembly and modification of numerous soluble proteins and membrane proteins.