Table 3.

Alternative red fluorescent proteins and their thermodynamic and photo-physical properties.

FP	pKa	Excitation and emission (nm)	Relative brightness (%)	Relative photostability (%)	Selected reference
DsRed-monomer	4.5	556/586	10.3	9.2	Shaner et al. (2005)
mCherry	<4.5	587/610	47.0	55.2	Shaner et al. (2005)
tdTomato	4.7	554/581	279.4	56.3	Shaner et al. (2005)
mStrawberry	<4.5	574/596	76.5	8.6	Shaner et al. (2005)
mPlum	<4.5	590/649	12.1	30.5	Shaner et al. (2005)
TagRFP	3.1	555/584	142	21.3	Merzlyak et al. (2007), Day and Davidson (2009)
TagRFP-T	4.6		99	193.7	Shaner et al. (2008)
mKate2	5.4	588/633	74		Chudakov et al. (2010)
LSS-mKate2	2.7	453/605			Piatkevich et al. (2010)

Photo-stability and brightness are reported as relative values with respect to EGFP.