Fig. 5
From: An affinity-structure database of helix-turn-helix: DNA complexes with a universal coordinate system
Visualizing distances between recognition helices as a graph. a Nodes (pink circles) represent individual recognition helices. Edges (blue lines) are formed between two nodes if their respective recognition helices have a sequence distance of zero. Disconnected nodes (pink circles with no edges) are unique HTH domains. b Some subgraphs are not fully connected, i.e. not every node is connected to every other node. In such cases the central-most node with the highest resolution is chosen