1DKI:
reference: Crystal structure of the zymogen form of the group A Streptococcus virulence factor SpeB: an integrin-binding cysteine protease., Kagawa TF, Cooney JC, Baker HM, McSweeney S, Liu M, Gubba S, Musser JM, Baker EN, Proc Natl Acad Sci U S A 2000 Feb 29;97(5):2235-40. PMID: 10681429

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