Database of protein binding motifs

[BUSTOS at UMBC2.UMBC.EDU]

Dear Bio-soft community:
I am interested in gathering information on "confirmed" protein-binding
DNA motifs from prokaryotic and eukaryotic origin.  Could anyone point me
in the direction of a database or some other form of compiled list?  As 
usual, please direct your replies directly to my internet address:
bustos at umbc2.umbc.edu
I will post a summary of the responses in case someone else is interested
in similar information.
I thank everyone in advance.
Sincerely,

Mauricio M. Bustos, Ph.D.
Dept. of Biological Sciences
University of Maryland
Baltimore, MD.