Human ecto-5'-nucleotidase (CD73): crystal form I (open) in complex with adenosine. The image was created in PyMol from information in the PDB. ;Other information: The publication where the structural information was first found is Crystal Structure of the Human Ecto-5'-Nucleotidase (CD73): Insights into the Regulation of Purinergic Signaling by Knapp, K., Zebisch, M., Pippel, J., El-Tayeb, A., Muller, C.E., Strater, N.