Phosphoramidite for incorporation of Biotin at the 5' end of an oligonucleotide.

Phosphoramidite for incorporation of Biotin with a triethylene glycol spacer internally or at the 5' end of an oligonucleotide.

Phosphoramidite for incorporation of Biotin internally or at the 5' end of an oligonucleotide.

Phosphoramidite for incorporation of Biotin with a dT nucleobases, internally or at the 5' end of an oligonucleotide.

Phosphoramidite used to incorporate a dinitrophenyl-modification, either internally or at the terminus of an oligonucleotide.