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In this work, we verified that transferrin fluorescently labelled with lissamine rhodamine sulfochloride (Tf-LRSC) is internalized in epidermoid A431 carcinoma cells through the specific endocytic pathway of transferrin. The FRAP of this fluorescent marker internalized in the late compartment of transferrin endocytosis (LCT) was measured in living A431 cells. These experiments showed the presence...
In previous works, other authors characterized a compartment (LCT) of A431 carcinoma cells in which markers of transferrin endocytose had accumulated during a long chase period. This compartment, was essentially formed by large stationary vacuoles. A few small vesicles budded from these vacuoles, rapidly saltated along microtubules and eventually fused with other vacuoles, causing an intracellular...
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