3SHI:
reference: The catalytic domain of MMP-1 studied through tagged lanthanides., Bertini I, Calderone V, Cerofolini L, Fragai M, Geraldes CF, Hermann P, Luchinat C, Parigi G, Teixeira JM, FEBS Lett. 2011 Sep 19. PMID: 21945315

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