What are the requirements for the Features section in a Sequence Listing?

The Features section in a Sequence Listing has specific requirements, particularly for representing variable elements:

• A mandatory feature is required to cover every “n” or “Xaa” used in a sequence.
• The feature consists of numeric identifiers , , , and .
• Numeric identifier should remain blank.
• Numeric Identifier should be selected from Appendices E and F to Subpart G of Part 1 of the CFR.
• Numeric identifier should identify the location of the “n” or “Xaa” within the sequence.
• Numeric identifier should specify what the “n” or “Xaa” can be.

The MPEP states: A mandatory feature is required to cover every “n” or “Xaa” used in a sequence. The feature consists of numeric identifiers , , , and . Numeric identifier should remain blank, numeric Identifier should be selected from Appendices E and F to Subpart G of Part 1 of the CFR (reproduced in MPEP § 2422 (I)), numeric identifier should identify the location of the “n” or “Xaa” within the sequence, and numeric identifier should specify what the “n” or “Xaa” can be. (MPEP 2429)

These requirements ensure that all variable elements in a sequence are properly defined and explained in the Sequence Listing.

To learn more:

• Features Section
• Sequence Listing
• Patent Application
• Biotechnology
• Numeric Identifiers