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. 2015 Jun 19;2(3):031203. doi: 10.1117/1.NPh.2.3.031203

Fig. 4.

Fig. 4

Biosensor design based on RFP complementation. Two potentially interacting proteins are fused to the two fragments of a split RFP. Interaction between the two protein partners bring the RFP fragments in close proximity, leading to reconstitution of an intact RFP and a corresponding increase in red fluorescence.