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The dimerization of GA/B and RA/B were reversible. (A) Process diagram of competition experiment. After the formation of droplet containing RA/B dimer, abundant NTD-RBD-GA was added to the droplets to compete with NTD-RBD-RA. (B) After adding NTD-RBD-GA, green fluorescence appears and red fluorescence intensity decreases. NTD-RBD-GA competes with NTD-RBD-RA to form fluorescent dimers. Scale bar = 10 µm.
