Citation: La. Profenno et al., GUANOSINE BINDS TO THE TETRAHYMENA RIBOZYME IN MORE THAN ONE-STEP, AND ITS 2'-OH AND THE NONBRIDGING PRO-S-P PHOSPHORYL OXYGEN AT THE CLEAVAGE SITE ARE REQUIRED FOR PRODUCTIVE DOCKING, Biochemistry, 36(41), 1997, pp. 12477-12485