Figure 3. The superimposition of conformations for SUMO1_HUMAN. Seven structures in PDB provide 17 conformations. 1A5R has ten conformations, 1Y8R has two conformations and 3KYD, 1WYW, 2PE6, 3KYC and 2BF8 has one conformation individually. The ribbons are colored by segments as the followings, black for loop, red for helix, blue for strand and light blue for turn.