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Structural comparisons. A, representative structures from various proteins with the carbamylated lysine coordinated with one metal by half-occupied geometry. Yellow, TnDhp; blue, transcarboxylase (1RQB); pink, pyruvate carboxylase (2QF7); white, pyruvate carboxylase (3BG3). B, the carbamylated lysine coordinated with two metals shares a similar geometry of the key residues as well as the same environment. Yellow, TnDhp; magenta, urease (1EJX); orange, dihydroorotase (2Z26).
