Useful mixed-modified phosphoramidite.

An adenosine analogue with the hydrogen bond donor deleted.

Phosphoramidite for incorporation of a 6-thio-modified deoxguanosine in a synthetic oligonucleotide.

Useful degenerate base phosphoramidite that pairs with C or T.

Guanosine analogue phosphoramidite which lacks the O6 carbonyl_x000D_ resulting in a_x000D_ hydrogen bonding pattern isomeric_x000D_ with that of adenosine.

Phosphoramidite used to incorporate a 2’-O-methoxyethyl-modified methyl-C into an oligonucleotide, useful for antisense RNA.

Phosphoramidite replacement for dC that enhances base-pairing.

Useful phosphoramidite for probing the steric requirements at N2 of dG in various applications.

Phosphoramidite used to incorporate an amino-modified 2'-OMe A into an oligonucleotide.

Convertible phosphoramidite that allows the formation of N6-alkyl-dA residues through reaction with alkyl amines.