6hbt A 18 1.66 URS0000BC4678_33072 30609994 33072 gguggggacgaccccanc <<<<<<<....>>>>>>> (((((((....))))))) The structure of the G. violaceus guanidine II riboswitch P2 stem-loop with arcaine; RNA (5'-R(*GP*GP*UP*GP*GP*GP*GP*AP*CP*GP*AP*CP*CP*CP*CP*AP*(CBV)P*C)-3')