I am searching for a relatively weak promoter, for Arabidopsis, that is
expressed, preferentially, in all cell types -- including epidermal
cells. The 35S promoter is too strong, the ocs promoter is not expressed
in the epidermal cells (at least in tobacco), and for other reasons I do
not want to use the mas promoter. Have any studies been done on cell
specific expression of the nos promoter? Are there any other promoters
that fit my needs? I would appreciate any suggestions.