Allosteric ribozymes as molecular switches and sensors / Garrett A. Soukup -- Ribozymes and deoxyribozymes switched by oligonucleotides / Dipankar Sen and Edward K.Y. Leung -- Ribozymes switched by proteins / Tan Inoue and Yoshiya Ikawa -- Fluorescence-signaling nucleic acid-based sensors / Razvan Nutiu, Lieven P. Billen, and Yingfu Li -- Protein-induced RNA switches in nature / Oliver Mayer ... [et al.] -- Riboswitches as genetic control elements / Ali Nahvi and Ronald R. Breaker -- Switchable RNA motifs as drug targets / Eric Westhof, Boris François, and Quentin Vicens