FIGURE 3.
Plot in barycentric coordinates for all known RNA structures as defined by Equation (2). Each dot represents a single, known RNA structure. The position of the dot indicates the bipolar (bottom left), coplanar (bottom right), or random (top) nature of the distribution of base-normal vectors in the RNA molecule. The cyan star indicates the corresponding barycentric coordinates of the P4–P6 subdomain of the L-21 T. thermophila group I intron crystal structure. Red, green, cyan, and blue dots are tRNAs, rRNAs, catalytic RNAs, and uncategorized RNAs, respectively.
