T. Clark Brelje, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
Robert L. Sorenson, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
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Endoplasmic reticulum (ER) forms an interconnected network of flattened, membrane-enclosed sacs or tube-like structures known as cisternae. The ER is the site of many cellular activites including the biosynthesis of proteins and lipids.
Micrograph of a small area of hepatocyte cytoplasm including several mitochondria, and profiles of the two types of ER.
Rough Endoplasmic Reticulum (RER; cyan) - cytosolic side covered by ribosomes that form peptides that enter the adjacent cisterna during synthesis.