


For example, ST.25 (last updated in 2009) fails to capture some of the growing sequence types present today, such as branched sequences, D-amino acids and nucleotide analogs. ST.26 seeks to harmonize sequence listing practices across all patent offices, reflect advances in biotechnology and meet international sequence database requirements. As of the same date, Members States also apply the new Standard to national and regional patent applications. The new Standard applies to international applications filed on or after July 1, 2022. ST.26 replaces the former standard, WIPO Standard ST.25 and lays out the requirements for presenting nucleotide and/or amino acid sequences in patent applications. If you file patent applications that disclose DNA, RNA or amino acid sequences, you may have already heard about the new WIPO Standard ST.26.
