6HZG:
reference: Structural and functional analysis of glycoside hydrolase 138 enzymes targeting chain A galacturonic acid in the complex pectin rhamnogalacturonan II., Labourel A, Basle A, Munoz-Munoz J, Ndeh D, Booth S, Nepogodiev SA, Field RA, Cartmell A, J Biol Chem. 2019 Mar 15. pii: RA118.006626. doi: 10.1074/jbc.RA118.006626. PMID: 30877196

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