FAM-dT phosphoramidite

Cat. # Quantity Price Lead time
13460 100 mg –   in stock
23460 250 mg $275.00 in stock
43460 1 g $1340.00 in stock
63460 5 g $3830.00 in stock
83460 10 g please inquire in stock

This phosphoramidite allows fluorescein (FAM) to be introduced into any position in the oligonucleotide sequence during synthesis by the phosphoramidite method (in the middle of the chain, at the 5’- and 3’-terminus). The reagent is a conjugate of deoxythymidine phosphoramidite and 6-isomer of FAM. Modification is performed during oligonucleotide synthesis by substituting standard dT phosphoramidite with fluorescein-dT phosphoramidite. This modification does not affect exonuclease or polymerase activity.

For modification with fluorescein at the 5’-terminus use FAM phosphoramidite, 6-isomer.


Coupling: 10 minutes

Deprotection: standard conditions using ammonium hydroxide; deprotection time depends on oligonucleotide composition and nucleobase protecting groups (deprotection for 17 h at 55 °С removes all protecting groups from standard nucleobases). AMA (solution of 30% ammonium hydroxide/40% aqueous methylamine 1:1 v/v) can be used with ~5% of non-fluorescent side product forming. To avoid formation of the side product, start deprotection with ammonium hydroxide (30 min at room temperature), then add an equal volume of 40% aqueous methylamine and continue deprotection as required with AMA (e.g. 10 min at 65 °C).

Absorption and emission spectra of FAM

Absorption and emission spectra of FAM

Customers also purchased with this product

Cyanine5 amine

Cyanine5 amine functionalized dye for the coupling with activated esters and epoxides.
Add this product to your cart and
get free express delivery

VIC phosphoramidite, 6-isomer

VIC is an asymmetrical xanthene dye with spectral properties similar to HEX and JOE. Useful as a label for qPCR probes.
Add this product to your cart and
get free express delivery

dsGreen Nucleic Acid Gel Staining Solution, 10000×

dsGreen for staining dsDNA in agarose and polyacrylamide gels.

General properties

Appearance: off white powder
Molecular weight: 1423.54
Molecular formula: C79H87N6O17P
Solubility: good in acetonitrile, DCM
Quality control: NMR 1H, NMR 31P, HPLC-MS
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: 492
ε, L⋅mol−1⋅cm−1: 74000
Emission maximum, nm: 517
Fluorescence quantum yield: 0.93
CF260: 0.22
CF280: 0.17

Oligo synthesis details

Diluent: acetonitrile
Your item has been added. View your cart or proceed to checkout
The count of items is incorrect.