5X32:
reference: Biochemical and structural characterization of Marinomonas mediterranead-mannose isomerase Marme_2490 phylogenetically distant from known enzymes., Saburi W, Jaito N, Kato K, Tanaka Y, Yao M, Mori H, Biochimie. 2018 Jan;144:63-73. doi: 10.1016/j.biochi.2017.10.016. Epub 2017 Oct, 26. PMID: 29107017

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