9v4v A 71 3.12 RF00167 40966503 0009113 1280 ngguuguauaagcucguuaauuuggaaugagcguaucuacaggcaaccguaaauugccccaggcuacaauc .<<<<<<<...<<<<<<<.....((>>>>>>>.......<.<<<<<)).....>>>>>...>..>>>>>>> .((((((((..(((((((.....[[)))))))......)(.(((((]].....)))))...)..))))))) Crystal structure of Guanine-II riboswitch in complex with isoxanthopterin; RNA (71-MER)