PMC

Faceted filtering of annotation data in QuickGO. Annotations in the GOA database can be filtered for particular subsets. Here the filters for human (taxon:9606) and direct assay evidence used in manual assertion (ECO identifier ECO:0000314) have been applied.

Annotation quality checks in the Protein2GO curation interface. If an annotation is incomplete or fails sanity checks, a warning is given and the curator is unable to add the annotation to the database. In the annotation pictured, an identifier is missing from the ‘With/From’ field.

Usage restrictions for GO terms. Information about the usage of each term is included on the GO term page in QuickGO. In the case of ‘metaphase’ (GO:0051323), this term cannot be used in primary GO annotations.