1IAD:
reference: Refined 1.8 A X-ray crystal structure of astacin, a zinc-endopeptidase from the crayfish Astacus astacus L. Structure determination, refinement, molecular structure and comparison with thermolysin., Gomis-Ruth FX, Stocker W, Huber R, Zwilling R, Bode W, J Mol Biol 1993 Feb 20;229(4):945-68. PMID: 8445658

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