Caveolae are lipid-rich craters in the plasma membrane with roles in exocytosis, endocytosis and signal transduction. Caveolae are formed by caveolin oligomers stabilised by cytoplasmic cavin proteins. On internalisation, caveolae can fuse with early endosomes, and then be recycled back to the plasma membrane or targeted to multivesicular bodies for degradation.

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