CHARACTERISTIC
* Brightness is a product of extinction coefficient and quantum yield, divided by 1000.
Molecular weight, kDa	26.1
Polypeptide length, aa	231
Fluorescence color	red (orange)
Excitation maximum, nm	553
Emission maximum, nm	574
Quantum yield	0.67
Extinction coefficient, M^-1cm^-1	92 000
Brightness*	61.6
Brightness, % of EGFP	187
pKa	4.4
Structure	dimer
Aggregation	no
Maturation rate at 37°C	super fast
Photostability	high
Cell toxicity	not observed
Main advantages	superbright and fast-maturing red fluorescent protein
Possible limitations	dimer, limited applicability for fusions generation