Table 1.

Examples of commonly used fluorescent indicators and actuators.

Commonly used optical indicators
	Type	Ex (nm)	Em (nm)
Di-4-ANBDQBS	Voltage sensor	640	$>700$
Di-8-ANEPPS	Voltage sensor	530	620
Rhod-4	Calcium sensor	524	551
Fura-2	Calcium sensor	$340/380$	510
EYFP	Reporter	515	530
EGFP	Reporter	480	510
Genetically encoded optical indicators
Arch-D95N	Voltage sensor	585	687
Arch-EEN	Voltage sensor	633	697
VSFP3 (mKate)	Voltage sensor	508	633
GCaMP	Calcium sensor	497	512
Genetically encoded optical actuators
	Type		Ex (nm)
ChR2	Depolarizing ion channel		470
ArchT	Repolarizing proton pump		575
NpHR	Repolarizing chloride pump		580