4WK9:
reference: New insights into the enzymatic mechanism of human chitotriosidase (CHIT1) catalytic domain by atomic resolution X-ray diffraction and hybrid QM/MM., Fadel F, Zhao Y, Cachau R, Cousido-Siah A, Ruiz FX, Harlos K, Howard E, Mitschler A, Podjarny A, Acta Crystallogr D Biol Crystallogr. 2015 Jul 1;71(Pt 7):1455-70. doi:, 10.1107/S139900471500783X. Epub 2015 Jun 30. PMID: 26143917

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