2FO5:
reference: Heterologous Expression, Purification, Refolding, and Structural-Functional Characterization of EP-B2, a Self-Activating Barley Cysteine Endoprotease., Bethune MT, Strop P, Tang Y, Sollid LM, Khosla C, Chem Biol. 2006 Jun;13(6):637-47. PMID: 16793521

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