The following genes with an identifier have been found but that do not have a mapping to Ensembl: 4
http://classic.wikipathways.org/instance/WP691_r135040 UGT2B7 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP691_r135040 UGT1A8 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP691_r135040 UGT1A10 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP691_r135040 UGT1A4 with datasource Entrez Gene
More details at https://www.wikipathways.org/WikiPathwaysCurator/GeneTests/genesWithoutEnsemblMapping