What is ST26 and Why Is It Required?


The ST26 format is a new global standard introduced by WIPO for submitting biological sequence listings in patent applications. It officially replaces the earlier ST.25 format and has become mandatory for all new filings. Unlike ST.25, ST26 requires sequence listings to be submitted in XML format, making the data clearer, more structured, and easier to review across international patent systems.

While this format improves data accuracy and global compatibility, it is also more complex. Because of the strict formatting and validation rules, working with experts is often the safest way to avoid errors and delays.


Main Features of the ST26 Format


The ST26 standard introduces several changes that improve how biological sequences are presented. These updates make the listings more thorough and help reviewers better understand the details. Key features include:


  • Use of structured XML for clean, machine-readable formatting
  • Support for D-amino acids, branched sequences, and other advanced types
  • Required annotation of any modified residues
  • Expanded labeling for describing sequence features clearly

These elements ensure high-quality submissions, but they also require a deep understanding of both biology and technical XML formatting.


How Our ST26 Services Help You


We provide expert ST26 sequence listing services to simplify your patent filing process. Whether you're starting from scratch or converting existing listings from ST.25, our experienced team manages everything for you. We ensure every sequence is properly formatted and fully compliant with WIPO guidelines.


Our services include:

  • Creating new ST26-compliant sequence listings in XML
  • Converting old ST.25 files into the ST26 format
  • Validating files with official WIPO tools to catch and fix errors
  • Resolving formatting issues before final submission
  • Offering guidance on proper sequence disclosure strategies

From start to finish, we make sure your listing is complete, clear, and error-free


Why Choose Us for Your ST26 Needs?


We’ve successfully prepared hundreds of ST26 listings for inventors, attorneys, and research professionals across various industries. Our team stays updated on the latest WIPO changes, and we use custom tools to speed up the listing process while maintaining top accuracy.

What makes us stand out:


  • In-depth knowledge of the ST26 standard and WIPO rules
  • Quick, reliable service with strict quality checks
  • Zero rejection rate for submitted sequence listings
  • Supportive and clear communication throughout the project


With us, you can file your sequence listings confidently.


Start Your ST26 Submission the Right Way



Avoid technical errors and delays. Let our professionals prepare your ST26 sequence listing quickly and correctly.


Contact us today for a free consultation. We'll help you submit your biotech patent listing without stress—accurate, compliant, and right on time.