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The pa per pres ents some as pects cor re lat ing ther mal sta bil ity of RNA fold ing and the oc cur rence of struc tural mo tifs in nat u ral ri bo nu cleic ac ids. Par tic u larly, the ther- mody namic sta bil ity of 2 -5' and 3'-5' linked RNA and the contribution of unpaired ter mi nal nu cleo tides (dan gling ends) in sec ond ary (2D) and ter tiary (3D) struc tures of RNA are dis cussed. Both...
Chemical instability of some of the phosphodiester bonds, often observed in large RNAs, visualizes the autocatalytic properties of this class of nucleic acids. Unexpectedly, selective hydrolysis occurs also in short oligoribonucleotides (as short as a tet- ramer or hexamer). Herein, we describe additional experiments which support the conclusion that the hydrolysis is not due to ribonuclease contamination...
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