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. Author manuscript; available in PMC: 2012 Oct 12.
Published in final edited form as: Nature. 2012 Apr 11;484(7393):233–236. doi: 10.1038/nature10964

Fig. 2.

Fig. 2

FRET responses (Y/C ratio) of cheR cheB cells to stepwise addition of chemical attractants. The attractants were added at the times indicated by the arrows. (a) CheY-YFP/CheZ-CFP FRET responses to 1 mM MeAsp (weak attractant). (b) CheY-YFP/CFP-FliM FRET responses to 2 mM MeAsp + 0.5 mM L-serine (strong attractant).