| http://www.w3.org/ns/prov#value | - A first aspect of the present invention is a method of identifying a compound which alters GPCR internalization, including: (a) providing a cell including a GPCR, an arrestin, and a modified GRK, wherein said GPCR is at least partially internalized in an agonist-independent manner upon expression of said GRK; (b) exposing said cell to the compound(s); (c) determining the cellular distribution of t
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