Fig. 5.

The ability to save lists from queries, to combine saved lists in various ways, and to “plug” those lists into other queries, all combine to give the user great power and flexibility. Complex tasks can be broken down into a series of simple steps. In this example, the user wants the expression data for genes associated with certain embryonic lethality phenotypes in homozygous mutants. In the first panel (1), the user queries for all mouse genes and models (genotypes) associated with embryonic lethality. In the next panel (2), the user has filtered the results down to homozygous mutants and the particular forms of lethality (steps not shown) and is now saving the list of 395 remaining genes. In the next panel (3), the user “plugs” the new list, named “Lethality genes” (naming step not shown), into a query that returns all the expression data for those genes (4)