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What holds the cisternae of the Golgi apparatus together?

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Diagram of the Golgi apparatus showing its stacked, curved membranes with labeled parts including cisternae, cis face, trans face, lumen, and various vesicles involved in cellular transport and secretion. — Golgi apparatus A membrane-bound organelle of eukaryotic cells, the Golgi apparatus is made up of a series of flattened, stacked pouches called cisternae that function as a series of compartments that progressively refine and direct cellular products to their proper destinations. .

The cisternae of the Golgi apparatus are held together by matrix proteins. Additionally, the entire organelle is supported by cytoplasmic microtubules.12