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. 2002 Oct 21;99(22):14147–14152. doi: 10.1073/pnas.212392599

Fig 3.

Fig 3.

Schematic illustrating the model of intermembrane FRET as quenching of fluorescence emission from a donor (in lower membrane) by an offset plane of acceptors (upper membrane). The offset distance between the donor and the acceptor plane is z, and r is the distance between the donor and an acceptor. ρ is the in-plane radial coordinate over which the integration is performed.