1U9J:
reference: Crystal structure of Escherichia coli ArnA (PmrI) decarboxylase domain. A key enzyme for lipid A modification with 4-amino-4-deoxy-L-arabinose and polymyxin resistance., Gatzeva-Topalova PZ, May AP, Sousa MC, Biochemistry 2004 Oct 26;43(42):13370-9. PMID: 15491143

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