ProBLM Web Server: Protein and Membrane Placement and Orientation Package
Figure 1
The major axes shown for (a) helical protein (PDB ID: 1GZM) and (b) a beta barrel protein (PDB ID: 2JMM). These major axes are determined by an overall vector ensemble consisting of helical strands or beta sheets. (c) shows a top view of the beta-barrel with the major axis vector pointing through the barrel.