dna - (Nov/14/2003 )

hi i posted a some questions last month but never got a reply?
they were
what is the restriction endonuclease produced by Xenobacterium gigantus.?
and
Chemical analysis of viral DNA isolated in a laboratory, indicates the following composition 35% adenine: 20% thymine: 12% guanine and 33% cytosine. what does this imply about the structure of the viral DNA.

question 1:
try this link, you can search on many criteria of known restiction enzymes (also organism) :
http://rebase.neb.com/rebase/rebase.html

question 2:
maybe virus with single stranded DNA.......