4Q6M:
reference: Structural basis for the recognition of muramyltripeptide by Helicobacter pylori Csd4, a D,L-carboxypeptidase controlling the helical cell shape., Kim HS, Kim J, Im HN, An DR, Lee M, Hesek D, Mobashery S, Kim JY, Cho K, Yoon HJ, Han BW, Lee BI, Suh SW, Acta Crystallogr D Biol Crystallogr. 2014 Nov;70(Pt 11):2800-12. doi:, 10.1107/S1399004714018732. Epub 2014 Oct 16. PMID: 25372672

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