Long Oligonucleotide Synthesis

Long Oligonucleotide Synthesis

BOC RNA provides long oligonucleotide synthesis services. Based on our oligonucleotide synthesis platform, we provide our customers with efficient long oligonucleotides for cloning, mutagenesis, gene expression and other applications.


The emergence of gene synthesis and targeted mutagenesis has driven the need to synthesize long oligonucleotides (>75 nucleotides). While there is a high demand for long oligonucleotides (150 mer and more), the yields and associated side reactions of conventional DNA synthesis previously limited the availability of oligonucleotides to<150 nucleotides. The longer the oligonucleotide, the more difficult it is to isolate the pure bioactive product. No chemical reaction can be completed with 100% efficiency. In oligonucleotide synthesis reactions, conjugation, capping, oxidation and deblocking, any of these defects can lead to faulty sequences. The more the accumulation of failed sequences, the lower the possibility of obtaining pure oligonucleotides. This resulted in a mixture of n-1 deletion mutations. BOC RNA's expertise in oligonucleotide synthesis enables us to obtain high-quality DNA long oligonucleotides using the best available synthetic reagents, optimized synthetic protocols, and stringent quality assurance and quality control standards.

Long Oligonucleotide Synthesis Service Specifications

For additional information regarding custom long oligonucleotides synthesis, please feel free to contact us.

TypePurificationPriceStandard deliverables
Long oligonucleotidesPAGE / Dual-PAGEInquiry
  • Normalized and lyophilized dry DNA oligo powder in tubes or plates.
  • Certificate of Analysis (COA): including sequence information, OD, Tm, etc.
Ultra-long oligonucleotidesPAGE / Dual-PAGEInquiry

Available Modifications

Long Oligonucleotide Synthesis

Click here to learn about our modifications services.


  • Quality control by sequencing.
  • All desalted or/and purified by gel purified.
  • Cost effective - competitive pricing and highly customizable service.

Applications for long and ultra-long oligos

  • Gene-construction and cloning - CRISPR genome editing as HDR templates
  • Site-directed mutagenesis - efficiently and quickly generate large insertions, deletions or change stretches of sequence identity
  • Templates for in vitro transcription - templates for RNA synthesis using in-vitro transcription
  • Homology-directed repair
  • Targeted resequencing
  • shRNA libraries preparation
  • SNP synthetic positive control template for qPCR
  • Other high complexity synthetic biology applications
* Only for research. Not suitable for any diagnostic or therapeutic use.
Online Inquiry
Verification code
Event information
Inquiry Basket