FAM DBCO, 6-isomer

Cat. # Quantity Price Lead time
151F0 1 mg $110 in stock
251F0 5 mg $160 in stock
451F0 25 mg $260 in stock
551F0 50 mg $370 in stock
651F0 100 mg $525 in stock
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Fluorescein (FAM) is one of the oldest yet well-known fluorescent dyes. This derivative of FAM contains the cyclooctyne group (dibenzocyclooctyne, DBCO or ADIBO). Pure 6-isomer. DBCO reacts quickly and efficiently with azides by simply mixing the components without the need for a copper catalyst (so-called sterically promoted cycloaddition reaction or SPAAC).

FAM DBCO can be used for the labeling of proteins, peptides, nucleic acids, and other molecules containing azide groups. Fluorescein can be detected using a variety of different instruments.

Absorption and emission spectra of FAM

Absorption and emission spectra of FAM

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General properties

Appearance: orange solid
Molecular weight: 676.71
Molecular formula: C42H32N2O7
Solubility: good in DMF, DMSO
Quality control: NMR 1H, HPLC-MS (95%)
Storage conditions: Storage: 24 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: 492
ε, L⋅mol−1⋅cm−1: 74000
Emission maximum, nm: 517
Fluorescence quantum yield: 0.93

Product citations

  1. Wu, F.; Ren, Y.; Lv, W.; Liu, X.; Wang, X.; Wang, C.; Cao, Z.; Liu, J.; Wei, J.; Pang, Y. Generating dual structurally and functionally skin-mimicking hydrogels by crosslinking cell-membrane compartments. Nature Communications, 2024, 15(1), 802. doi: 10.1038/s41467-024-45006-7
  2. Jaiswal, M.; Tran, T. T.; Guo, J.; Zhou, M.; Kundu, S.; Guo, Z.; Fanucci, G. E. Spin-Labeling Insights into How Chemical Fixation Impacts Glycan Organization on Cells. Appl Magn Reson, 2023. doi: 10.1007/s00723-023-01624-w
  3. Sapozhnikova, K. A.; Gulyak, E. L.; Misyurin, V. A.; Simonova, M. A.; Ryabukhina, E. V.; Alexeeva, A. V.; Tikhonova, N. A.; Lyzhko, N. A.; Popova, G. P.; Misyurin, A. V.; Ustinov, A. V.; Korshun, V. A.; Alferova, V. A.; Ryazantsev, D. Y.; Brylev, V. A. Branched Linkers for Site-Specific Fluorescent Labeling of Antibodies. Molecules, 2023, 28(1), 425. doi: 10.3390/molecules28010425
  4. Khan, S. H.; Braet, S. M.; Koehler, S. J.; Elacqua, E.; Anand, G. S.; Okafor, C. D. Ligand-Induced Shifts in Conformational Ensembles That Describe Transcriptional Activation. eLife, 2022, 11, e80140. doi: 0.7554/eLife.80140
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