FAM maleimide, 6-isomer

FAM (Fluorescein) Maleimides Fluorescence polarization
Cat. # Quantity Price Lead time
24180 5 mg –   in stock
44180 25 mg $260 in stock
54180 50 mg $370 in stock
64180 100 mg $525 in stock
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FAM (fluorescein) is a bright fluorophore which is compatible with various fluorescence detection instruments. FAM is a universal dye that is useful for microscopy, qPCR and many other methods as well as for FRET-based and fluorescence polarization based binding assays.

FAM maleimide is a thiol reactive dye for the labeling of proteins, peptides, and other thiolated molecules.

FAM maleimide, 6-isomer
FAM maleimide, 6-isomer
FAM maleimide, 6-isomer structure
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FAM absorbance and emission spectra

FAM absorbance and emission spectra

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AF 343 (Coumarin)-X-NHS ester

AF 343 (Coumarin) is a blue emitting dye that can serve as a FRET donor for fluorescein (FAM). This structure features a linker between Coumarin 343 fluorophore, and the functional group. It provides better solubility, and spatial separation between the dye, and the functional group.

General properties

Appearance: yellow solid
Mass spec M+ increment: 498.4
Molecular weight: 498.44
Molecular formula: C27H18N2O8
Solubility: good in DMSO, DMF
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
CF260: 0.22
CF280: 0.17

Product citations

  1. Huang, S.; Gao, Y.; Ma, L.; Jia, B.; Zhao, W.; Yao, Y.; Li, W.; Lin, T.; Wang, R.; Song, J.; Zhang, W. Design of pH-responsive antimicrobial peptide melittin analog-camptothecin conjugates for tumor therapy. Asian Journal of Pharmaceutical Sciences, 2024, 19(1), 100890. doi: 10.1016/j.ajps.2024.100890
  2. Gabashvili, A.N.; Alexandrushkina, N.A.; Mochalova, E.N.; Goliusova, D.V.; Sapozhnikova, E.N.; Makarevich, P.I.; Nikitin, P.I. Internalization of transferrin-tagged Myxococcus xanthus encapsulins into mesenchymal stem cells. Experimental Biology and Medicine, 2024, 249(3), 10055. doi: 10.3389/ebm.2024.10055
  3. Peterson, B. G.; Hwang, J.; Russ, J. E.; Schroeder, J. W.; Freddolino, P. L.; Baldridge, R. D. Deep Mutational Scanning Highlights a Role for Cytosolic Regions in Hrd1 Function. Cell Reports, 2023, 42(11), 113451. doi: 10.1016/j.celrep.2023.113451
  4. Kalinovsky, D. V.; Kholodenko, I. V.; Kibardin, A. V.; Doronin, I. I.; Svirshchevskaya, E. V.; Ryazantsev, D. Y.; Konovalova, M. V.; Rozov, F. N.; Larin, S. S.; Deyev, S. M.; Kholodenko, R. V. Minibody-Based and ScFv-Based Antibody Fragment-Drug Conjugates Selectively Eliminate GD2-Positive Tumor Cells. International Journal of Molecular Sciences, 2023, 24(2), 1239. doi: 10.3390/ijms24021239
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