6F8N:
reference: Key residues affecting transglycosylation activity in family 18 chitinases - Insights into donor and acceptor subsites., Madhuprakash J, Dalhus B, Rani TS, Podile AR, Eijsink VGH, Sorlie M, Biochemistry. 2018 Jun 25. doi: 10.1021/acs.biochem.8b00381. PMID: 29939724

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