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Time: 2024-03-29T08:26:19Z
URL: http://scholar.google.com/scholar_lookup?title=Activity-dependent+internalization+of+smoothened+mediated+by+beta-arrestin+2+and+GRK2.&year=2004&author=Chen&journal=Science.&volume=306&issue=5705&pages=2257-2260&doi=10.1126%2Fscience.1104135&pmid=15618519