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Figure 4.
Fig. 4. The model of MAL with its substrate at the active
site. The residues that bind the metal ion are shown along with
those inferred to be the catalytic base (Lys331) and substrate
recognition (Arg80). His194, which may be important in
deprotonating the other diastereomer is also shown. MASP,
methylaspartate. The original position of the side chains of
Arg80 and Lys331 are shown in gray.
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