The following genes with an identifier have been found but that do not have a mapping to Ensembl: 4
http://classic.wikipathways.org/instance/WP844_r109474 CDKN1B with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP844_r109474 TP53 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP844_r109474 HDAC7A with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP844_r109474 ESPL1 with datasource Entrez Gene
More details at https://www.wikipathways.org/WikiPathwaysCurator/GeneTests/genesWithoutEnsemblMapping