Figure 9
(a) X-shaped crystals of the ppGpp riboswitch. A red arrow shows the tip of the crystal used for collecting data on FMX. (b) The crystal structure of the ppGpp-bound riboswitch (Peselis & Serganov, 2018). The RNA is in cartoon representation, with the sugar–phosphate backbone depicted as a cylindrical ribbon, colored according to its structural elements. ppGpp is shown as a stick model, surrounded by Mg2+ ions. |