The following genes with an identifier have been found but that do not have a mapping to Ensembl: 9
http://classic.wikipathways.org/instance/WP4884_r135048 TRAC with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP4884_r135048 IGHG1 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP4884_r135048 HLA-DRB4 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP4884_r135048 IGLC2 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP4884_r135048 IGHG4 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP4884_r135048 IGHE with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP4884_r135048 IGHG2 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP4884_r135048 TRBC1 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP4884_r135048 NLRP1 with datasource Entrez Gene
More details at https://www.wikipathways.org/WikiPathwaysCurator/GeneTests/genesWithoutEnsemblMapping