The following genes with an identifier have been found but that do not have a mapping to Ensembl: 4
http://classic.wikipathways.org/instance/WP3882_r139749 Fxyd2 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP3882_r139749 KCNK13 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP3882_r139749 ROMK 2/3 with datasource Entrez Gene
http://classic.wikipathways.org/instance/WP3882_r139749 KCNJ13 with datasource Entrez Gene
More details at https://www.wikipathways.org/WikiPathwaysCurator/GeneTests/genesWithoutEnsemblMapping