What is considered a “sequence” for the purpose of assigning sequence identifiers?

According to MPEP 2412.05(a), a “sequence” that requires a separate sequence identifier is defined by WIPO Standard ST.26, paragraph 7, as:

• An unbranched sequence or a linear region of a branched sequence containing ten or more specifically defined nucleotides, with adjacent nucleotides joined by a 3′ to 5′ (or 5′ to 3′) phosphodiester linkage or any chemical bond mimicking naturally occurring nucleic acids.
• An unbranched sequence or a linear region of a branched sequence containing four or more specifically defined amino acids, forming a single peptide backbone joined by peptide bonds.

The MPEP states: “WIPO Standard ST.26, paragraph 10, requires each ‘sequence’ be assigned a separate sequence identifier, including a sequence which is identical to a region of a longer sequence.” This means that even subsequences meeting these criteria must be assigned unique identifiers.

To learn more:

• sequence definition
• WIPO Standard ST.26
• nucleotide sequence
• amino acid sequence
• patent application