Figure 5.

The conserved binding site of 2 nonhomologous Mg²⁺-proteins. (a) Cartoon diagram of the metal-binding domain in N-acylamino acid racemase (1SJC). (b) Cartoon diagram of the metal-binding domain in gamma enolase (2AKZ). (c) Superposition of the first-shell structural letters of 1SJC (blue) and 2AKZ (yellow).