1ASM:
reference: Crystal structures of Escherichia coli aspartate aminotransferase in two conformations. Comparison of an unliganded open and two liganded closed forms., Jager J, Moser M, Sauder U, Jansonius JN, J Mol Biol 1994 Jun 3;239(2):285-305. PMID: 8196059

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