CHARACTERISTIC
* Brightness is a product of extinction coefficient and quantum yield, divided by 1000.
Molecular weight, kDa	26.28
Polypeptide length, aa	231
Fluorescence color	true-red
Excitation maximum, nm	574
Emission maximum, nm	602
Quantum yield	0.35
Extinction coefficient, M^-1cm^-1	74 400
Brightness*	26.0
Brightness, % of EGFP	79
pKa	4.7
Structure	dimer
Aggregation	no
Maturation rate at 37°C	fast
Photostability	medium
Cell toxicity	not observed
Main advantages	true-red fluorescent protein, ideal compatibility with popular filter sets
Possible limitations	dimer, limited applicability for fusions generation