TAMRA (also known as TMR or tetramethylrhodamine) is a xanthene dye that has been used as a fluorescent label for decades. Xanthene dyes are available as two isomers (called 5- and 6-isomers) that have almost identical fluorescent properties, but need to be separated to avoid doubling and smearing of labeled product peaks or bands during chromatography or electrophoresis. This is a pure 6-isomer of TAMRA maleimide, used for the labeling of proteins and peptides via thiol (SH) groups.
Absorption Maxima
541 nm
Extinction Coefficient
84000 M-1cm-1
Emission Maxima
567 nm
Fluorescence Quantum Yield
0.1
CF260
0.32
CF280
0.19
Mass Spec M+ Shift after Conjugation
551.2
Purity
95% (by 1H NMR and HPLC-MS).
Molecular Formula
C31H28N4O6
Molecular Weight
552.58 kDa
Product Form
Dark colored solid.
Solubility
Good in DMSO and DMF.
Storage
Shipped at room temperature. Upon delivery, store in the dark at -20°C. Avoid prolonged exposure to light. Desiccate.
Disclaimer
This product is for research use only. It is not intended for diagnostic or therapeutic use.
