3AJE:
reference: Crystal structure of Sulfolobus tokodaii Sua5 complexed with L-threonine and AMPPNP., Kuratani M, Kasai T, Akasaka R, Higashijima K, Terada T, Kigawa T, Shinkai A, Bessho Y, Yokoyama S, Proteins. 2011 Jul;79(7):2065-75. doi: 10.1002/prot.23026. Epub 2011 May 2. PMID: 21538543

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