Fig. 1: Comparison of PTx and gdPT X-ray crystal structures.

a X-ray structures of gdPT (PDB: 6RO0). Subunit colors: S1 blue, S2 beige, S3 green, S4 aqua, and S5 purple. b Comparison between gdPT (blue) and PTx (green) (PDB: 1PRT). c Bottom view comparison of gdPT and PTx.