This data set contains the module annotations (tmod$MODULES), gene to
module (tmod$GENES2MODULES) and module to gene (tmod$MODULES2GENES) mappings
and a gene list (tmod$GENES).
tmod$MODULES and tmod$GENES are data frames, while tmod$MODULES2GENES and
tmod$GENES2MODULES are lists with, respectively, module and gene
identifiers as names.