Figure 2. Cryo-EM structure of the BAM complex.

(a) Views of the front and back face of the cryo-EM structure of the intact BAM complex at 4.9 Å resolution. BamA is coloured blue, BamB in green, BamC in yellow, BamD in orange and BamE in magenta. Density corresponding to the micelle of n-dodecyl-β-D-maltopyranoside (DDM) in the structure is shown as a pale grey mesh. (b) Flexible fitting of a hybrid X-ray structure into the EM density. The views and colouring are identical, but density for the micelle has been masked and the EM density made transparent, showing the fitted pseudo-atomic model within. This colour scheme is maintained for all further figures showing the cryo-EM structure. The figure was made using UCSF Chimera⁶⁴.