Expression data is a tab seperated text file. Fisrt column is the gene ID following the pattern of abst#(KEGG ID or STRING ID).
Other columns are gene expression values in different conditions, eg
abst#sce:YLR154C-->0.76-->0.93-->1.00-->1.00-->0.12-->0.42
abst#sce:YKL012W-->0.12-->0.00-->0.16-->0.10-->0.00-->0.13
abst#sce:YJL147C-->1.00-->0.31-->0.00-->1.00-->0.05-->0.65
...