ask some question about gene expression data - (Feb/21/2006 )

Now I am studying the relationship between gene expression and genome features ,such as intron length.So I need some expression data of model organism.I have download tair's microarray data ,but its readme file said that the expression data are value are red/green ratio,are they the ratio of control/test expression level.dose it can be used as gene's expression level.If not,which data I can use for my research.

It depends what control they used. Sure, this is result data of two color array. For your experiment, you'd better use one color array data commonly from Affy chip. Good luck.