The following DataNodes have no identifier: 2
http://www.wikipathways.org/instance/WP4225_rr126065 http://rdf.wikipathways.org/Pathway/WP4225_rr126065/DataNode/a02e7 (AKT)
http://www.wikipathways.org/instance/WP4225_rr126065 http://rdf.wikipathways.org/Pathway/WP4225_rr126065/DataNode/aae77 (methylmalonate semialdehyde
dehydrogenase)