Binding of purified recombinant Glo qRRM1, qRRM2, qRRM3, and qRRM1,2 proteins to radiolabeled G-tract (5′-AGGGA) RNA. Representative EMSA gels are shown, with data plotted below. The highest protein concentration (right-most lanes) was 3.1 μM and 2-fold serial dilutions were assayed. No protein was added to the reactions in the lanes marked ‘-’. The positions of unbound RNA (asterisk) and Glo qRRM:RNA complexes (arrowhead) are indicated. Three technical replicates of EMSAs were performed, and apparent Kd values shown are mean ± SEM.