Active site residue identities and geometric values.

With the exception of the GTA neutron diffraction studies [44] hydrogen atoms are not directly observed, so distances are given between centers of non-hydrogen atoms. Italic enzyme names indicate the model did not contain an acceptor molecule.
aPDB 2AM3 has a glycerol molecule modeled as an acceptor.
bIt is likely that the active species are not actually water molecules, but residues in disordered regions of the polypeptide.
cb, c and f are octahedral binding partners to the coordinated metal atom M as described in Figure 2.