TAMRA maleimide, 6-isomer

Cat. # Quantity Price Lead time
18180 1 mg $110 in stock
28180 5 mg $260 in stock
48180 25 mg $410 in stock
58180 50 mg $695 in stock
68180 100 mg $1190 in stock
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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 to label proteins and peptides via thiol (SH) groups.

Absorption and emission spectra of 6-TAMRA

Absorption and emission spectra of 6-TAMRA

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General properties

Appearance: dark colored solid
Mass spec M+ increment: 551.2
Molecular weight: 552.58
Molecular formula: C31H28N4O6
Solubility: good in DMSO, DMF
Quality control: NMR 1H, HPLC-MS (95%)
Storage conditions: Storage: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 541
ε, L⋅mol−1⋅cm−1: 84000
Emission maximum, nm: 567
Fluorescence quantum yield: 0.1
CF260: 0.32
CF280: 0.19

Product citations

  1. Li, H.; Li, X.; Chen, L.; Li, B.; Dong, H.; Liu, H.; Yang, X.; Ueda, H.; Dong, J. Quench-Release-Based Fluorescent Immunosensor for the Rapid Detection of Tumor Necrosis Factor α. ACS Omega, 2021, 6(46), 31009–31016. doi: 10.1021/acsomega.1c03941
  2. Mendez, A.S.; Ly, M.; González-Sánchez, A.M.; Hartenian, E.; Ingolia, N.T.; Cate, J.H.; Glaunsinger, B.A. The N-terminal domain of SARS-CoV-2 nsp1 plays key roles in suppression of cellular gene expression and preservation of viral gene expression. Cell Reports, 2021, 37(3), 109841. doi: 10.1016/j.celrep.2021.109841
  3. Ast, J.; Arvaniti, A.; Fine, N. H. F.; Nasteska, D.; Ashford, F. B.; Stamataki, Z.; Koszegi, Z.; Bacon, A.; Jones, B. J.; Lucey, M. A.; Sasaki, S.; Brierley, D. I.; Hastoy, B.; Tomas, A.; D’Agostino, G.; Reimann, F.; Lynn, F. C.; Reissaus, C. A.; Linnemann, A. K.; D’Este, E.; Calebiro, D.; Trapp, S.; Johnsson, K.; Podewin, T.; Broichhagen, J.; Hodson, D. J. Super-Resolution Microscopy Compatible Fluorescent Probes Reveal Endogenous Glucagon-like Peptide-1 Receptor Distribution and Dynamics. Nature Communications, 2020, 11(1), 467. doi: 10.1038/s41467-020-14309-w
  4. Sagert, L.; Hennig, F.; Thomas, C.; Tampé, R. A loop structure allows TAPBPR to exert its dual function as MHC I chaperone and peptide editor. eLife, 2020, 9, e55326. doi: 10.7554/eLife.55326
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