4ZLF:
reference: Crystal structure and substrate recognition of cellobionic acid phosphorylase playing a key role in oxidative cellulose degradation by microbes., Nam YW, Nihira T, Arakawa T, Saito Y, Kitaoka M, Nakai H, Fushinobu S, J Biol Chem. 2015 Jun 3. pii: jbc.M115.664664. PMID: 26041776

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