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As in WIPO ST.25, it is possible to mark a particular sequence as 'skipped'. This is so that the residue data of a particular sequence can be ignored but the subsequent sequences do not
need to be renumbered. See paragraph 3(d) and 58 of WIPO ST.26 A skipped sequence is a sequence ID number that exists in a sequence listing but has no data associate with it. An example where this may be useful: an applicant wants to delete SEQ ID NO: 50 from their application, but doesn't want to go through the trouble of renumbering SEQ ID NOs: 51-100. SEQ ID NO: 50 can simply be turned into a "skipped sequence" and SEQ ID NOs. 51-100 can maintain their SEQ ID numbers.