Fig. 3

Top hits superposed. The top two DALI hits to the full foamy virus capsid are shown as a α-carbon backbone (stereo pair) coloured using the residue similarity score calculated by SAP. (red = strong similarity, blue = none). The amino terminus of the foamy structure is marked by a large ball and the other structure is distinguished by small balls on its α-carbon atoms. a a cytoskeleton associated protein (fragment) of the arc/arg3.1 gene (PDB code: 4x3x-A), (which is thought to have originated from a Ty3/Gypsy retrotransposon family capsid) and (b) the structure of the capsid C-terminal domain of the Rous scarcoma virus (PDB code: 3g29-A)