>6CK4_1|Chains A, B, C, D|PRPP riboswitch|Thermoanaerobacter mathranii (583357) GUGAAAGUGUACCUAGGGUUCCAGCCUAUUUGUAGGUGUUCGGACCGAGCGGUACAGGUAUAUUUUUAUAUACCACACCUUAGGGACAAAAGCCCGAGAGGAUAGGUUUCACUCGUA