1. to published work from our laboratory cited below REFERENCES AND;Rosenberg;NOTES Nature Intern Med Chem Brit Biochirnie Acids Res Mol Biol Biochemistry Nature Cancer Res Nature,1969
2. in press;Sundquist;Inorg Chem,1987
3. den de;Hartog;Nucleic Acids Res,1982
4. in press;Kozelka;Biopolymers
5. den der;Hartog;Eur J Biochem,1985