1SBN:
reference: Refined crystal structures of subtilisin novo in complex with wild-type and two mutant eglins. Comparison with other serine proteinase inhibitor complexes., Heinz DW, Priestle JP, Rahuel J, Wilson KS, Grutter MG, J Mol Biol 1991 Jan 20;217(2):353-71. PMID: 1992167

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