1LZS:
reference: Structural changes of active site cleft and different saccharide binding modes in human lysozyme co-crystallized with hexa-N-acetyl-chitohexaose at pH 4.0., Song H, Inaka K, Maenaka K, Matsushima M, J Mol Biol 1994 Dec 16;244(5):522-40. PMID: 7990138

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