Synthesis of three guanosine monomers substituted with alkylthiol chai
ns at either carbon-8 or the 2'-hydroxyI is described. The ready acces
sibility of these monomers will facilitate the use of disulfide cross-
links to study the Folding and dynamics of RNA and will also provide l
oci for conjugation of reporter groups. (C) 1997 Elsevier Science Ltd.