| Qualifier | old_locus_tag |
| Definition | feature tag assigned for tracking purposes |
| Value Format | "text" (single token) |
| Example | /old_locus_tag="RSc0382" /locus_tag="YPO0002" |
| Comment | /old_locus_tag can be used with any feature where /gene is valid and where a /locus_tag qualifier is present. Identical /old_locus_tag values may be used within an entry/record, but only if the identical /old_locus_tag values are associated with the same gene; in all other circumstances the /old_locus_tag value must be unique within that entry/record. Multiple/old_locus_tag qualifiers with distinct values are allowed within a single feature; /old_locus_tag and /locus_tag values must not be identical within a single feature. |