3NJV:
reference: Structural and Biochemical Studies Elucidate the Mechanism of Rhamnogalacturonan Lyase from Aspergillus aculeatus., Jensen MH, Otten H, Christensen U, Borchert TV, Christensen LL, Larsen S, Leggio LL, J Mol Biol. 2010 Sep 17. PMID: 20851126

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