The term heading each column was used to search the Mouse Locus Catalog [7]. The gene symbols listed in the column are those returned in response to the search. Because this is a text search, any matching text within the written description of the phenotypes for mutants known for that gene will be counted as a match. The 23 irrelevant results were returned due to: *match based on mapping this gene close to the mutant displaying this phenotype; ^†experimental result of using mice displaying this phenotype in relation to the gene in question; ^‡match based on gene name, not phenotype; ^§match based on another mutation which is stated as arising in a stock carrying this phenotype.