A deeply buried 5-residue structural motif. A) Structures of two unrelated hits with pdb ids 1o94 (chain A, left), 2obk (chain A, right) and 2dpo (centre), aligned with respect to their common structural motif. B) Expansions of the corresponding structures in A, to clearly show the common structural motif. The backbone rmsd:s of the presented structural motifs to the original configuration in 2dpo are 0.38 (1o94) and 0.38 Å (2obk), respectively. The structures have been coloured as described in the text for Figure 2.