3MYO:
reference: Crystal structures of LacD from Staphylococcus aureus and LacD.1 from Streptococcus pyogenes: Insights into substrate specificity and virulence gene regulation., Lee SJ, Kim HS, Kim do J, Yoon HJ, Kim KH, Yoon JY, Suh SW, FEBS Lett. 2011 Jan 21;585(2):307-12. Epub 2010 Dec 28. PMID: 21192932

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