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. 2006 Sep 8;362(1):78–88. doi: 10.1016/j.jmb.2006.06.079

Figure 1.

Figure 1

Ribbon representation of the three-dimensional structure of human MMP-1 (E200A). Helices have been coloured pink and the strands shown in green. There are four calcium ions and two zinc ions found in the structure that have been coloured grey and orange, respectively. The secondary structural elements have been annotated: helices (hA-hC), strands (s1–s5) of the catalytic domain and blades (bI–bIV) of the hemopexin domain.