Gene Ontology terms for secretion systems under "cellular component" and "biological process.". GO terms for secretion systems described in this review article are encased in dashed boxes. (A) shows terms that are children of the process term "GO ID: 0009306 protein secretion". (B) shows terms that are children of the process term "GO:0044403: symbiosis, encompassing mutualism through parasitism". (C) shows terms that are children of "GO ID: 0005575 cellular component".