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For which applications is it best to order Ultramer® sequences (vs. short oligonucleotides)?

The Ultramer product utilizes an enriched synthesis chemistry that has a higher coupling efficiency, and as a result, you receive a higher percentage of full-length product in your sample. These higher purity sequences are suitable for demanding applications such as cloning, ddRNAi, and gene construction and can save researchers a great deal of time and trouble in these applications through direct synthesis of the entire target fragment. Additionally, Ultramer oligonucleotides are a good choice for template synthesis due to the available lengths of up to 200 bases.