1HYL:
reference: 1.8 A structure of Hypoderma lineatum collagenase: a member of the serine proteinase family., Broutin I, Arnoux B, Riche C, Lecroisey A, Keil B, Pascard C, Ducruix A, Acta Crystallogr D Biol Crystallogr. 1996 Mar 1;52(Pt 2):380-92. PMID: 15299709

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