15  Genome annotation

15.1 ab initio annotation

15.2 Homology annotation

15.3 Functional annotations

15.3.1 Gene Ontology

15.3.2 Cluster of orthologous genes

15.3.3 Enzyme commission

KEGG enrichment

15.4 Annotation files

15.4.1 the GBK and GBFF

15.4.2 The GFF specifications

15.5 Visualizing genomes and annotations