1SGP:
reference: Water molecules participate in proteinase-inhibitor interactions: crystal structures of Leu18, Ala18, and Gly18 variants of turkey ovomucoid inhibitor third domain complexed with Streptomyces griseus proteinase B., Huang K, Lu W, Anderson S, Laskowski M Jr, James MN, Protein Sci 1995 Oct;4(10):1985-97. PMID: 8535235

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