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. 2017 Apr 24;4:9. doi: 10.1186/s40580-017-0103-4

Fig. 28.

Fig. 28

Schematic illustrations of various conformations of the fusion proteins. a EBFP (blue) and EGFP (green) are situated in a straight line, with the flexible linker (red) between the two domains. b EBFP and EGFP reside side by side, for the most compact conformation with the flexible linker. c The helical linker connects EBFP and EGFP diagonally. d The helical linker and the long axes of EBFP and EGFP are situated in a straight line

(Figure adapted with permission from: Ref. [347]. Copyright (2004) John Wiley & Sons)