1CK7: Gelatinase A (Full-Length)
reference: Structure of human pro-matrix metalloproteinase-2: activation mechanism revealed., Morgunova E, Tuuttila A, Bergmann U, Isupov M, Lindqvist Y, Schneider G, Tryggvason K, Science 1999 Jun 4;284(5420):1667-70. PMID: 10356396

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).