diff --git a/epdb/models.py b/epdb/models.py
index 5f5471a6..558eae66 100644
--- a/epdb/models.py
+++ b/epdb/models.py
@@ -1785,9 +1785,9 @@ class Reaction(
         edges = Edge.objects.filter(edge_label=self)
         for e in edges:
             for scen in e.scenarios.all():
-                for ai in scen.additional_information.keys():
-                    if ai == "Enzyme":
-                        res.extend(scen.additional_information[ai])
+                for ai in scen.get_additional_information():
+                    if ai.type == "Enzyme":
+                        res.append(ai.get())
         return res