3EIF:
reference: Model for substrate interactions in C5a peptidase from Streptococcus pyogenes: A 1.9 A crystal structure of the active form of ScpA., Kagawa TF, O'Connell MR, Mouat P, Paoli M, O'Toole PW, Cooney JC, J Mol Biol. 2009 Feb 27;386(3):754-72. Epub 2009 Jan 6. PMID: 19152799

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