Table 1. Properties of mMaple and related variants.

Protein name	State	λex(nm)	λem(nm)	εa	Φ	Brightnessb	pK a
mMaple	green	489	505	15 (26, 59)	0.74	11	8.2
mMaple	red	566	583	30	0.56	17	7.3
mClavGR2	green	488	504	19 (25, 60)	0.77	15	8.0
mClavGR2	red	566	583	32	0.54	17	7.3
mEos2	green	506	519	78 (32, 95)	0.43	34	5.6c
mEos2	red	573	584	39	0.35	14	6.4c

^aExtinction coefficent (mM⁻¹ cm⁻¹) at peak absorbance wavelength in PBS (pH 7.4). Value in parentheses was determined at pH 4 and pH 10, respectively.

^bProduct of ε and Φ in mM⁻¹ cm⁻¹. For comparison, the brightness of EGFP and mCherry are 34 mM⁻¹ cm⁻¹ and 16 mM⁻¹ cm⁻¹, respectively [53].

^cData from McKinney et al. [30].