3gca A 33 2.75 URS000080E32E_32630 19261617 32630 cugggucgcaguaaccccaguuaacaaaacaag <<<<<...(......>>>>>............) (((((...[.[....))))).........]..] The structural basis for recognition of the preQ0 metabolite by an unusually small riboswitch aptamer domain; PreQ1 riboswitch