1J1N:
reference: Crystal structure of AlgQ2, a macromolecule (alginate)-binding protein of Sphingomonas sp. A1, complexed with an alginate tetrasaccharide at 1.6-A resolution., Mishima Y, Momma K, Hashimoto W, Mikami B, Murata K, J Biol Chem 2003 Feb 21;278(8):6552-9. Epub 2002 Dec 16. PMID: 12486124

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