FAM Phosphoramidite, 5-Isomer

Cat. # Quantity Price Lead time
2639-500mg 500 mg –   in stock
2639-1g 1 g $190.00 in stock
2639-5g 5 g $740.00 in stock
2639-10g 10 g $1290.00 in stock
2639-50g 50 g please inquire 21 days

Standard fluorescein (FAM) phosphoramidite for 5'-terminal oligonucleotide labeling, high isomeric purity single isomer. This highly purified amidite reagent ensures excellent coupling results with various synthesizers.

Samples and special offers are available for oligo manufacturers. Contact us for bulk supplies of this reagent.

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FAM Phosphoramidite, 6-Isomer

Single isomer 6-FAM phosphoramidite for the synthesis of modified oligonucleotides.
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General properties

Appearance: off white solid
Molecular weight: 843.94
CAS number: 147566-42-5
Molecular formula: C46H58N3O10P
Solubility: Good solubility in acetonitrile and DCM
Quality control: NMR 1H and 31P, HPLC-MS (95+%), isomeric purity > 97%
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: 494
ε, L⋅mol−1⋅cm−1: 75000
Emission maximum, nm: 520
Fluorescence quantum yield: 0.9
CF260: 0.20
CF280: 0.17

Oligo synthesis details

Diluent: acetonitrile
Coupling conditions: coupling time 10 min
Cleavage conditions: ammonia, 2 h at room temperature
Deprotection conditions: identical to protected nucleobases; when AMA is used, deblock with ammonia alone for 30 min, then add methylamine

Product citations

  1. Petrunina, N.A.; Lebedev, V.V.; Kirillova, Y.G.; Aralov, A..V.; Varizhuk, A.M.; Sardushkin, M.V. DNA Intercalated Motifs with Non-Nucleoside Inserts. Russian Journal of Bioorganic Chemistry, 2021, 47(6), 1341–1344. doi: 10.1134/S1068162021060212
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