> I have never heard of this happening (or seen a structure where there was > density for this type of adduct)
Maybe it is kind of textbook-knowledge? BMC p48 Fig 2-27 http://www.ruppweb.org/garland/gallery/Ch2/index_2.htm BR Does anyone know whether or not this is possible, and why it does or does not happen? Thanks, Mike -- Michael C. Thompson Graduate Student Biochemistry & Molecular Biology Division Department of Chemistry & Biochemistry University of California, Los Angeles mi...@chem.ucla.edu