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. 2014 May 27;289(30):20991–21002. doi: 10.1074/jbc.M114.560680

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© 2014 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 2. — PR* binding of all spin-labeled arrestin-2 cysteine mutants used in this study. The ability of each arrestin-2 mutant to bind to PR* was tested. Wild-type arrestin-2 in the presence (wt Arr2) and absence (ctrl) of PR* are shown as positive and negative controls, respectively. Added arrestin-2 (blank), arrestin-2 in the pellet fraction (P), and arrestin-2 in the supernatant (S) fraction are shown for each protein. Arrestin binding to PR* is indicated by the presence of this protein in the pellet, whereas unbound arrestin is found in the supernatant fraction.