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  • Title: Isolation of functional, coated, endocytic vesicles.
    Author: Woodman PG, Warren G.
    Journal: J Cell Biol; 1991 Mar; 112(6):1133-41. PubMed ID: 1900301.
    Abstract:
    Brief internalization of [125I]transferrin was used to label coated endocytic vesicles, which were then purified using a combination of 2H2O and 2H2O/Ficoll density gradients. Purification was monitored using an assay measuring fusion of endocytic organelles, so as to isolate functional vesicles. Isolated vesicles had all the properties of clathrin-coated vesicles, being enriched for the major components of clathrin coats and uncoated by either 1 M Tris-HCl or an uncoating ATPase. Nearly half of the labeled vesicles were able to participate in subsequent fusion events, as measured by the cell-free assay. Fusion was specific, requiring energy and cytosol, and being sensitive to N-ethyl maleimide.
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