3NQX:
reference: Structural basis for the autoprocessing of zinc metalloproteases in the thermolysin family., Gao X, Wang J, Yu DQ, Bian F, Xie BB, Chen XL, Zhou BC, Lai LH, Wang ZX, Wu JW, Zhang YZ, Proc Natl Acad Sci U S A. 2010 Oct 12;107(41):17569-74. Epub 2010 Sep 27. PMID: 20876133

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