Figure 1
(a) Twort ribozyme–product complex. Secondary-structure diagram of the Twort ribozyme (black) bound to a four-nucleotide product (gray). The 5′ and 3′ ends of the chains are indicated. Thin lines indicate Watson–Crick base pairs and G·U wobble base pairs are indicated by dots. (b) An orthorhombic crystal of the Twort ribozyme–product complex. This crystal is 0.2–0.3 mm in each dimension. |