Amidites are protected nucleotide derivatives containing a phosphoramidite functional group. Also known as phosphoramidites, they are highly reactive chemical intermediates widely used in the synthesis of oligonucleotides, DNA, RNA, and modified nucleic acid sequences. They play a central role in modern biotechnology, pharmaceutical development, molecular diagnostics, and genetic research. Due to their excellent coupling efficiency and compatibility with automated synthesizers, amidites have become the industry standard for solid-phase oligonucleotide synthesis. They enable the precise and stepwise assembly of nucleotide chains required for applications such as PCR primers, antisense oligonucleotides, siRNA, mRNA therapeutics, CRISPR guide RNA, and DNA sequencing technologies.
Types
- DNA amidites. DNA amidites are essential building blocks used in the synthesis of standard DNA oligonucleotides. They contain protected nucleotide bases such as adenine, cytosine, guanine, and thymine, which enable accurate and efficient stepwise DNA chain assembly during solid-phase synthesis. Due to their high coupling efficiency and compatibility with automated synthesizers, DNA amidites are widely applied in PCR primer production, gene synthesis, DNA sequencing, molecular diagnostics, and biotechnology research.
- RNA amidites. RNA amidites are specially designed nucleotide derivatives used for RNA oligonucleotide synthesis. Unlike DNA amidites, they include additional protection groups for the 2'-hydroxyl group of ribose sugars, ensuring stability during synthesis. RNA amidites are commonly used in the production of siRNA, mRNA therapeutics, CRISPR guide RNA, aptamers, and RNA interference research. Because of their moisture sensitivity and more complex chemistry, they require careful storage and controlled deprotection conditions.
- Modified amidites. Modified amidites are functionalized phosphoramidite compounds developed to introduce specific chemical properties into oligonucleotides. These amidites can enhance molecular stability, improve binding affinity, or add functional groups for labeling and detection purposes. Common examples include fluorescent amidites, biotin amidites, amino modifiers, thiol modifiers, spacer amidites, and LNA amidites. They are extensively used in advanced diagnostics, therapeutic oligonucleotides, biosensors, fluorescence assays, and modern molecular biology applications.
Applications
- Pharmaceutical industry. Amidites are essential raw materials in the development and manufacturing of modern oligonucleotide therapeutics. They are widely used in the synthesis of antisense oligonucleotides (ASOs), siRNA drugs, mRNA therapeutics, and gene-editing components. With the rapid growth of precision medicine and nucleic acid–based therapies, high-purity amidites have become increasingly important for ensuring the quality, stability, and effectiveness of pharmaceutical products.
- Biotechnology and research. In biotechnology and life science research, amidites are widely used for DNA and RNA synthesis, PCR primer production, gene assembly, sequencing technologies, and synthetic biology applications. Their high coupling efficiency and compatibility with automated synthesizers make them indispensable tools in modern molecular biology laboratories and research institutions.
- Diagnostic applications. Modified amidites are commonly used in molecular diagnostics and biosensor technologies to produce fluorescent probes, labeled oligonucleotides, and hybridization assays. They play an important role in real-time PCR, next-generation sequencing (NGS), fluorescence detection, and clinical diagnostic systems by enabling highly sensitive and accurate molecular analysis.
Choose Alfa Chemistry
Amidites are fundamental building blocks in modern oligonucleotide synthesis. Their high efficiency, flexibility, and compatibility with automated synthesis systems make them indispensable in pharmaceuticals, biotechnology, anddiagnostics.Our company provides a comprehensive range of high-quality amidite products, including DNA amidites, RNA amidites, and various modified amidites, to support research, diagnostic, and industrial applications worldwide.
Please kindly note that our products are for research use only.
