 The reason for the change and the evidence for the change are added to the annotation of the CDS – these can be seen in the Visible/Remark section of the CDS's ‘Tree Display’ section on the WormBase web site.In WormBase, a Gene is a region that is expressed or a region that has been expressed and is now a Pseudogene.Genes have unique identifiers like ‘WBGene00006415’.