The Golgi body is a membranous structure within the cytoplasm of cells involved with the further modification of carbohydrates, lipids and proteins. It is composed of a series of flattened, parallel chambers - cisternae - close to the cell nucleus and usually, rough endoplasmic reticulum. It is polarized. The cis face is the receptive end that accepts incoming vesicles from the rER; the trans face and particularly an area termed the trans-Golgi network, is involved in carefully forming vesicles and directing them to destinations such as lysosomes and the plasma membrane for exocytosis.
Within the cisternae, molecules are modified e.g.:
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