Oligonucleotide Programs

How this supports a project

Material selection starts with the sequence and modification map, then aligns protected monomers, solid support, backbone chemistry, terminal handles, deprotection, and the analytical plan.

Material decisions across the workflow

Most synthetic oligonucleotides are assembled stepwise on a solid support. In a phosphoramidite cycle, detritylation, coupling, oxidation or sulfurization, and capping are repeated until the strand is complete. Modified monomers and functional handles must be compatible with the selected coupling and deprotection conditions.

The material list should therefore be built from the full strand design rather than from the sequence alone. Sugar and base modifications, backbone linkages, the 3′ terminus, and any terminal or internal conjugation site affect the required monomers, support, reagents, and purification strategy.

How material decisions enter the program

Define the construct

Record the sequence, strand format, sugar and base modifications, backbone pattern, termini, and intended conjugation sites.

Select monomers and solid support

Match protected phosphoramidites and the support or linker to the required 3′ end and planned cleavage conditions.

Set the assembly chemistry

Choose coupling, oxidation or sulfurization, capping, and detritylation conditions that are compatible with the modified building blocks.

Plan cleavage, deprotection, and purification

Check protecting-group compatibility and define how the full-length product will be separated from truncated or incompletely deprotected material.

Add and confirm the conjugate when required

A ligand or functional handle may be introduced during solid-phase assembly or by post-synthetic conjugation, followed by identity and purity confirmation.

What to define before an inquiry

Sequence and modification map

Mark every modified sugar, base, internucleotide linkage, and terminal group instead of supplying only the base sequence.

3′ architecture

Specify the required 3′ residue or functional group because it determines the solid support or support-bound linker.

Backbone pattern

State where phosphodiester or phosphorothioate linkages are required so oxidation and sulfurization steps can be planned.

Conjugation plan

Define the attachment position, ligand or label, spacer, reaction pair, and compatibility with assembly and deprotection.

Analytical expectations

Set the identity, purity, and conjugate-confirmation methods needed for the intended research stage.

Application boundary

This page organizes chemistry inputs and related catalog routes. It does not assess sequence selection, biological activity, delivery performance, clinical suitability, or regulatory status. Those questions require program-specific experimental evidence.

Related catalog and technical pages

Oligonucleotide synthesis and modification materialsBrowse phosphoramidites, modified nucleosides, solid supports, sulfurizing reagents, and related synthesis inputs.Oligo conjugation and delivery ligandsBrowse GalNAc ligands, lipid and cholesterol handles, click handles, and oligo-conjugation linkers.Oligonucleotide modification platformReview the CHEMOS scope for sugar, base, backbone, terminal, and conjugation modifications.Conjugation chemistry and linkersCompare functional handles, spacer designs, and stable or cleavable linker options.GalNAc versus lipid conjugationReview the different chemistry questions raised by GalNAc and lipid conjugation routes.