>3vrs_A mol:na length:52 Fluoride riboswitch GGGCGAUGAGGCCCGCCCAAACUGCCCUGAAAAGGGCUGAUGGCCUCUACUG >3vrs_A mol:na length:52 Fluoride riboswitch GGGCGAUGAGGCCCGCCCAAACUGCCCUGAAAAGGGCUGAUGGCCUCUACUG