---
authors: GO Curators
external_accession: 
  - ECO:0000307
  - AspGD_REF:ASPL0000111607
  - CGD_REF:CAL0125086
  - dictyBase_REF:2
  - dictyBase_REF:9851
  - FB:FBrf0159398
  - MGI:MGI:2156816
  - RGD:1598407
  - SGD_REF:S000069584
  - TAIR:Communication:1345790
  - ZFIN:ZDB-PUB-031118-1
  - GO_REF:nd
id: "GO_REF:0000015"
is_obsolete: false
year: 2002
layout: goref
---

## Use of the ND evidence code for Gene Ontology (GO) terms.
Direct annotations to any of the three root terms 'molecular function; GO:0003674', 'biological process; GO:0008150' or 'cellular component; GO:0005575' indicate that curators have found no data supporting an annotation to a more specific term, either in the literature and/or by sequence similarity for this gene or protein as of the date of the annotation.