- Morphing between the open (2UBP) and closed (3UBP) conformation of the Sporosarcina pasteurii urease flexible flap. The protein backbone is shown as a light blue ribbon, while the flap is in dark cyan. Lys220, Cys322 and His323 are shown as sticks. The Ni(II) ions are
shown as green spheres. The morphing in the bottom animation is rotated by 180° around the vertical axis vs the top animation.
Animations made with UCSF Chimera