The following genes with an identifier have been found but that do not have a mapping to Ensembl: 9
http://classic.wikipathways.org/instance/WP655_r128741 Igf1 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP655_r128741 ATR with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP655_r128741 Cdk2 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP655_r128741 Apaf-1 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP655_r128741 Atm with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP655_r128741 Mdm2 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP655_r128741 Pigs with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP655_r128741 Casp8 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP655_r128741 B99 with datasource Entrez Gene
More details at https://www.wikipathways.org/WikiPathwaysCurator/GeneTests/genesWithoutEnsemblMapping