2X26:
reference: Structure of the aliphatic sulfonate-binding protein SsuA from Escherichia coli., Beale J, Lee SY, Iwata S, Beis K, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2010 Apr 1;66(Pt, 4):391-6. Epub 2010 Mar 26. PMID: 20383006

This OCA Structure page
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