2PNS:
reference: A thermostable cysteine protease precursor from a tropical plant contains an unusual C-terminal propeptide: cDNA cloning, sequence comparison and molecular modeling studies., Ghosh R, Dattagupta JK, Biswas S, Biochem Biophys Res Commun. 2007 Nov 3;362(4):965-70. Epub 2007 Aug 28. PMID: 17767923

This OCA Structure page
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