A Directed Acyclic Graph (DAG) visualizing the hierarchical structure of the Gene Ontology (GO) in inoculated kumquat leaves. Children that represent a more specific instance of a parent term have 'is a' relationship to the parent. The darker the color of the node the more number of Blast hits and the higher annotation score it has. All nodes contain the hit annotation scores in numbers.
Khalaf et al. BMC Plant Biology 2011 11:159 doi:10.1186/1471-2229-11-159