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Opioid‐induced recruitment of Nb33 and arrestin‐3 to μ‐receptors in HEK 293 cells. Concentration response‐induced recruitment of the conformationally selective nanobody Nb33‐Venus (a) and of arrestin‐3‐Venus in the presence of GRK2 (b) to the μ‐receptor‐RLuc8. Data shown are means ± SEM; n = 5 experiments performed in duplicate.
