diff --git a/src/ontology/go-edit.obo b/src/ontology/go-edit.obo
index 8b98eb52e..95ec44a7b 100644
--- a/src/ontology/go-edit.obo
+++ b/src/ontology/go-edit.obo
@@ -90823,7 +90823,7 @@ intersection_of: has_primary_output CHEBI:58210 ! FMN(3-)
 id: GO:0009399
 name: nitrogen fixation
 namespace: biological_process
-def: "The process in which nitrogen is taken from its relatively inert molecular form (N2) in the atmosphere and converted into ammonium, which is more biologically available." [PMID:36344435] {comment="PMID:32796519"}
+def: "The process in which nitrogen is taken from its relatively inert molecular form (N2) in the atmosphere and converted into ammonium, which is more biologically available." [PMID:32796519, PMID:36344435]
 xref: MetaCyc:N2FIX-PWY
 xref: Wikipedia:Nitrogen_fixation
 is_a: GO:0071941 ! nitrogen cycle metabolic process