Sunday, December 24, 2006

Golgi apparatus


The Golgi apparatus (purple) is bound by a single membrane, and is similar to the endoplasmic reticulum (blue). The apparatus comprises a stack of large membrane-bound vesicular plates (4) important in packaging macromolecules for transport within the cell. The cis side of the Golgi complex is closer to the ER, and the trans side is farther from the ER. Golgi bodies are vesicles that have bud off (3) from the plates. animation - golgi apparatus and budding golgi body : animation - golgi at work : animation - lysosomes "suicide sacks" : tour lysosome

Thus, the stack of large vesicles is surrounded by numerous small vesicles (2) containing the macromolecules . The hormonal, neurotransmitter, or enzymatic content of lysosomes, peroxisomes and secretory vesicles are contained in these membrane-bound vesicles at the periphery of the Golgi apparatus. Delivery of macromolecules is effected by symmetric back-forth endosomal transport along the microtubules of the cytoskeleton.

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