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. 2012 Jul 30;109(33):13266-13271. doi: 10.1073/pnas.1118622109

Fig. 4.

Fig. 4.

Electron density map of composite coiled-coil fibrils comprising multiple SAF peptides. (A) Electron density map (EMDB entry number 1995) generated using the Burnham Brandeis Helical Package (30), showing the lobes of density spaced 41.8 Å apart. Solid surface and net contain 60% and 100% of the mass of the protein, respectively. (B) The arrows indicate the lobe of electron density into which the Asp and Arg salt bridges fit, as well as the tyrosine residue, after docking the model using Chimera (University of California, San Francisco) (32).