Table 1.

Forster Resonance Energy Transfer (FRET) sensors used in this study.

Sensor	Binding Domain	EC50	Reference
Epac1-camps	Epac1	2.4 µM	V.O. Nikolaev et al., J. Biol. Chem. 2004 [17]
pmEpac1	Epac1	9.1 µM	R.K. Perera et al., Circ. Res. 2015 [18]
Epac1-PLN	Epac1	5.3 µM	J.U. Sprenger et al., Nat. Commun. 2015 [19]
Epac-SH74	Epac1	11–14 µM	J. Klarenbeek et al., PLoS ONE 2011 [20]
AKAP79-CUTie	Prkar2β	7.4 µM	N. Surdo et al., Nature Commun 2017 [21]