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Influence of GHS-R1a dimerization on ligand binding. FRET-monitored binding of a FITC-labeled ghrelin peptide (JMV 4946) to Alexa Fluor 350-labeled GHS-R1a assembled in lipid discs. The binding data are presented as the variations in FRET ratio as a function of JMV 4946 concentration. 1a, monomer; 1a:1a, homodimer; 1a:1b, GHS-R1a-GHS-R1b heterodimer. The data represent the mean ± S.D. from three independent experiments.
