TABLE 1.

Selected genetically encoded indicators.

Type	Sensor examples	Reference
Calcium	GCaMP6	Chen et al., 2013
	GCaMP7	Dana et al., 2019
	jRGECO1	Dana et al., 2016
	XCaMPs	Inoue et al., 2019
Voltage	QuasAr2	Hochbaum et al., 2014
	ArcLight	Kwon et al., 2017
Dopamine	GRABDA	Sun et al., 2018
	dLight1	Patriarchi et al., 2018
Glutamate	SF-iGluSnFR	Marvin et al., 2018
Acetylcholine	GACh	Jing et al., 2018
Potassium	KIRIN1	Shen et al., 2019