Fig. 4.
The superimposed (a) catalytic site, (b) structural site, (c) S-loop, and (d) V-B loop of (MMP1 Zn1 Zn2) (red), (MMP1 Zn1) (blue), (MMP1 Zn2) (yellow), and (MMP1 no Zn) (green).
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