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Although cell-penetrating peptides (CPP) facilitate endocytic uptake of proteins, little is known regarding the extent to which CPPs facilitate protein cargo exit from endocytic vesicles for targeting to other intracellular sites. Since the plasma membrane and less so intracellular membranes contain cholesterol, the fluorescent sterol analogues dansyl-cholestanol (DChol) and dehydroergosterol (DHE)...
Cholesterol itself has very few structural/chemical features suitable for real-time imaging in living cells. Thus, the advent of dehydroergosterol [ergosta-5,7,9(11),22-tetraen-3β-ol, DHE] the fluorescent sterol most structurally and functionally similar to cholesterol to date, has proven to be a major asset for real-time probing/elucidating the sterol environment and intracellular sterol trafficking...
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